| "A county I could love": Thomas MacDonagh in Carlow 1915 | Kinsella, Shay | Article in Journal | | 2018 |
| "A first class fighting man" : Frank Hugh O'Donnell's correspondence with John Quinn | Londraville, JanisLondraville, Richard | Article in Journal | | 1991 |
| "A good idea of colonial life" : personal letters and Irish migration to New Zealand | McCarthy, Angela, 1971- | Article in Journal | | 2001 |
| "A new description of empire" :
Edmund Burke and the regicide republic of letters | Ryan, Dermot | Article in Journal | | 2010 |
| "An Gleann agus a Raibh Ann": Cur Chuige Eagarthóireachta | Ó Drisceoil, Proinsias | Article in Journal | | 2012 |
| "Come you all courageously" : Irish women in America write home | Harris, R.-A. M. | Article in Journal | | 2001 |
| "Dear Mother - it's a terrible life" : Irish soldiers' letters from the Boer War, 1899-1900 | Owens, Gary | Article in Journal | | 1998 |
| "From a dear and worthy land" : Michael Keane and the Irish in the eighteenth-century West Indies | Quintanilla, Mark S. | Article in Journal | | 2009 |
| "I hope to write as bad as ever" :
Swift's journal to Stella and the Intimacy of correspondence | Williams, Abigail | Article in Journal | | 2011 |
| "I prefer a free country". letters to and from County Galway emigrants 1843-1856 | Roy, James Charles | Article in Journal | | 2004 |
| "I will do myself the pleasure of now writing to you": Louisa Conolly's letters to her sister Sarah Bunbury | Twomey, Brendan | Article in Book | | 2018 |
| "May God bless you and all at home" : mid-nineteenth-century Irish views on Italy as seen through the letters of Albert Delahoyde, 1860-1870 | O'Driscoll, Florry | Article in Book | Liverpool University Press | 2019 |
| "My darling Danny" : letters from Mary O'Connell to her son Daniel, 1830-1832 | O'Connell, Mary | Monograph or Collective Volume | Cork University Press | 1998 |
| "Philosophick views"? Maria Edgeworth and the Great Famine | Kelleher, Margaret | Article in Journal | | 1997 |
| "Suitable accommodations" : a selection of J.F. Powers's letters from Ireland, 1951-1963 | Powers, Katherine Anne | Article in Journal | | 2002 |
| "The desired haven"? Impressions of New Zealand in letters to and from Ireland, 1840-1925 | McCarthy, Angela, 1971- | Article in Book | Longman | 2000 |
| "These people never seem to lose their charm": Calum Iain Maclean in Clonmel | Wiseman, Andrew | Article in Journal | | 2012 |
| "To know Coleraine was to know Dr Boyd": Getting to know him over the years 1980-2015! | Lunney, Linda | Article in Journal | | 2015 |
| "To the land of the free from this island of slaves" : Henry Stratford Persse's letters from Galway to America, 1821-1832 | Persse, Henry StratfordPethica, James L.Roy, James C. | Monograph or Collective Volume | Cork University Press | 1998 |
| "We cannot always suffer ecstasy" : the letters of Sean O'Casey | Krause, David | Article in Journal | | 1989 |
| "Womanish Epistles?" Martha McTier, Female Epistolarity and Late Eighteenth-Century Irish Radicalism | Kennedy, Catriona | Article in Journal | | 2004 |
| "Worth fighting for" : colonial adventurer Michael D'Arcy and the Irish migrant experience | Molloy, Kevin | Article in Journal | | 2013 |
| "Your humble servant" : notes and letters from Portarlington, 1692-1768 | Powell, J. S. (John Stocks) | Monograph or Collective Volume | Frenchchurch Press | 1999 |
| 'A volley of execrations' : the letters and papers of John Fitzgibbon, Earl of Clare, 1772-1802 | | Monograph or Collective Volume | Irish Manuscripts Commission | 2005 |
| 'An ocean of consolation' : letters and Irish immigration to Australasia | Fitzpatrick, David | Article in Book | | 1989 |
| 'As good a country as any man needs to dwell in' : letters from a Scotch-Irish immigrant in Pennsylvania, 1766, 1767 and 1784 | | Article in Journal | | 1983 |
| 'Dear Sir Hamilton' : letters 1915-41 | Greer, David | Article in Book | | 1978 |
| 'Fight on to the last man' : a letter to Liam Lynch | Lane, Fintan | Article in Journal | | 2003 |
| 'I have treated you as an artist' : a letter from Philippe-Jacques de Loutherbourg to Jonathan Fisher | Laffan, WilliamRooney, Brendan | Article in Journal | | 2014 |
| 'It was grand to see our Tommies': reactions to the Easter Rising in the Monica Roberts Collection | Murphy, Ellen | Article in Journal | | 2016 |
| 'Lapped furrows' : correspondence 1933-1967, between Patrick and Peter Kavanagh : with other documents | | Monograph or Collective Volume | Peter Kavanagh Hand Press | 1969 |
| 'Members of the republick of letters': Maria Edgeworth, literary sociability and intellectual pursuits in the Irish midlands | Prendergast, Amy | Article in Journal | | 2016 |
| 'Monstrum horrendum'. A newly discovered poem from county Offaly in the 1641 Rebellion | Maxwell, Jane | Article in Journal | | 2019 |
| 'My dear Lady C': Letters of Lady Arabella Denny to Lady Caldwell, 1754-1777 | Denny, Arabella, Lady, 1707-1792 | Article in Journal | | 2009 |
| 'My dear men' : the Monica Roberts collection from the First World War | Kelly, Bernard | Article in Book | Dublin City Council | 2018 |
| 'My dear uncle' : a letter from New York, 1789 | Patton, W. Donald | Article in Journal | | 1994 |
| 'On the dodge' : Peadar O'Donnell in Texas | Shovlin, Frank | Article in Journal | | 2010 |
| 'Part of the family' : correspondence between the folklore collector Seán Mac Mathúna (1876-1949) and the Irish Folklore Commission | Uí Ógáin, Ríonach | Article in Journal | | 2003 |
| 'Prospects of This New Colony' : Letters of Ulster Emigrants to New Zealand 1840-1900 | Parkhill, Trevor | Article in Journal | | 1991 |
| 'Seditious literature' and a burning piano | Casement, Tom | Article in Book | | 2016 |
| 'Stamp out this vermin' | Wilson, Henry, Sir | Article in Book | | 2016 |
| 'The drooping genius of our isle to raise': the Moira Salon and its role in Gaelic cultural revival | Prendergast, Amy | Article in Journal | | 2011 |
| 'The independent expression of public opinion' : the Paris correspondence of Francis Sylvester Mahony | Dunne, Fergus | Article in Journal | | 2007 |
| 'The war is more shadow-like than ever here': An English Governess in Ireland During World War One | Fisher, William | Article in Journal | | 2018 |
| 'Them wild woods' : the Greeves, O'Brien and Sinton letters. The Transatlantic letters of an Irish Quaker family, 1818-1877 | | Monograph or Collective Volume | Ulster Historical Foundation | 2011 |
| 'To Mrs Martin I am indebted...'. Earliest Theobald Wolfe Tone manuscript (1783) recently discovered | Kleinman, Sylvia | Article in Journal | | 2017 |
| 'To tell you all about it': a letter from Mrs Marion Kelleher to her family written in the immediate aftermath of the 1916 Rising in Dublin | Kelleher, Marion | Article in Journal | | 2016 |
| 'To the land of the free from the islands of slaves' : Henry Stratford Persse's letters from Galway to America, 1821-1832 | | Monograph or Collective Volume | Cork University Press | 1998 |
| 'We hope that the tempest is soon calmed' - early Irish Jesuits | Moynes, Vera | Article in Journal | | 2018 |
| 'We the regulators of the County of Kilkenny': threatening letters and social conflict in the 1830s | Dunne, Terry | Article in Journal | | 2018 |
| 'With the greatest affection for ye all': Lieutenant Thomas Mahon in the Bahamas, 1790-92 | Moran, Alan | Article in Journal | | 2022 |
| 'Your own for ever sis' : letters to Parsonstown, 1898-1901 | | Article in Journal | | 2017 |
| 1798: The view from Castle Bernard | Ní Chonaill, Áine | Article in Journal | | 2015 |
| 17th century letters of a northern Dominican | Robb, C. J. | Article in Journal | | 1945 |
| 1916 and beyond the Pale | Dunlop, Dorothy | Monograph or Collective Volume | Motelands Publishing | 2016 |
| A 'good figure': the story of George Cockburn (1764-1847) as revealed through contemporary letters and papers | Meredith, Jane | Article in Journal | | 2008 |
| A 'most vainglorious man' : the writings of Antonius Bruodin | McInerney, Luke | Article in Journal | | 2017 |
| A Ballyshannon emigrant's letter and Lifford jail | Cunningham, John B. 1944- | Article in Journal | | 1990 |
| A Ballyverdough letter | Casement, Hugh | Article in Journal | | 1996 |
| A bishop backs Sinn Féin | Fogarty, Michael, Bishop of Killaloe | Article in Book | | 2016 |
| A bishop of the penal times : being letters and reports of John Brenan, bishop of Waterford (1671-93) and archbishop of Cashel (1677-93) | | Monograph or Collective Volume | Cork UP | 1932 |
| A calendar of the letters of Thomas Bray, Archbishop of Cashel, 1792-1820 | Meagher, Mary T. | Thesis | | 1966 |
| A calendar of the missionary correspondence of All Hallows, Dublin, 1842-77 | Murray, Patrick, Rev. | Thesis | | 1956 |
| A cause worth dying for : the last letters of Pearse, MacDonagh and Clarke | Ó Corráin, Daithí | Article in Book | | 2016 |
| A Charles J. Kickham correspondence | Ó Broin, León, 1902-1990 | Article in Journal | | 1974 |
| A Civil War letter by guerrilla Tom Barry to his Mother | O'Hare, Patricia | Article in Journal | | 2023 |
| A Cork opinion on Cavan, 1949 | Nyhan, MarySaunderson, Billy | Article in Journal | | 2015 |
| A crux in the fourteenth letter of Columbanus | O Corrain, Donnchadh | Article in Journal | | 2017 |
| A curious letter of 1744 from the pages of 'The Gentleman's Magazine' | Fewer, Greg | Article in Journal | | 1998 |
| A D'Alton letter | Ireland, Aideen M. | Article in Journal | | 1983 |
| A dash of daring : Carmel Snow and her life in fashion, art and letters | Rowlands, Penelope | Monograph or Collective Volume | Atria Books | 2006 |
| A description of the Shannon estuary by Edmund Sexton c. 1540 | Sexton, Edmund | Article in Book | | 1998 |
| A descriptive list of the papers of Séamus Fitzgerald, LLD, 1896-1972 | Cork Archives Institute | Monograph or Collective Volume | Cork Archives Institute | 2000 |
| A Donegal writer in Germany : Jemima Montgomery, Baroness Tautphoeus (1807-1893) | Meehan, Helen | Article in Journal | | 2009 |
| A Dublin Diocesan Cleric in Buenos Aires | Walsh, Edward | Article in Journal | | 2023 |
| A Farney emigrant’s story : Christopher Byrne’s American letter | Harris, Ruth-Ann | Article in Book | | 2017 |
| A father and son differ over the Civil War | Sweetman, John | Article in Book | | 2016 |
| A friend advises in a delicate matter - August 1780 | Donnelly, Brian | Article in Journal | | 1994 |
| A friend of the Ormondes | Greene, Michael | Article in Journal | | 2003 |
| A further unpublished letter of a distinguished Cork antiquary | Dolley, Michael | Article in Journal | | 1968 |
| A geological letter from John Jackson | Mitchell, Frank | Article in Journal | | 1993 |
| A Gogarty/Gregory correspondence 1910-30 | Lyons, J. B. (John Benignus) | Article in Book | | 2000 |
| A humourous letter of Mark O'Keefe | Ó Súilleabháin, Pádraig | Article in Journal | | 1972 |
| A journey to Ceylon | Aloysius of Mary, Brother | Article in Journal | | 1985 |
| A letter cherished by O'Donovan Rossa | Ó Maidín, Pádraig | Article in Journal | | 1980 |
| A letter for posterity | McCarthy, Michael | Article in Journal | | 1987 |
| A letter from 1916 | Black, Mollie | Article in Journal | | 2006 |
| A letter from a prisoner of war. Etreux, France - September 1914 | Good, Billy | Article in Journal | | 2014 |
| A letter from America | Kiely, Richard | Article in Journal | | 1999 |
| A letter from an Irish emigrant (1799) : a vindication of the United Irish rebellion in the North | Birch, Thomas LedlieRobinson, Kenneth | Monograph or Collective Volume | Athol | 2005 |
| A letter from county Waterford in 1798 | Anonymous | Article in Journal | | 1970 |
| A letter from Francis Johnston in the possession of the Armagh museum | Johnston, Francis | Article in Journal | | 1963 |
| A letter from home. The Quinn family of County Roscommon | Flanagan, PatsyQuinn, Pat | Article in Journal | | 2019 |
| A letter from Ireland : a little-known attack on David Hume's 'History of Ireland' | Ward, Robert E. | Article in Journal | | 1987 |
| A letter from Major John Butler to Lt. Col. Bolton, dated Laruvanack 8th July 1778 | Butler, JohnGillott, Thelma | Article in Journal | | 1987 |
| A letter from Missouri | Donnelly, Bernard | Article in Journal | | 1964 |
| A letter from Robert Hay, 1820 | Sweetman, William | Article in Journal | | 2004 |
| A letter from Roderic O'Flaherty to William Molyneaux, 1697 | | Article in Journal | | 1939 |
| A letter from Sir Matthew Barrington 1846 | Barrington, Matthew, Sir | Article in Journal | | 1995 |
| A letter from the Venerable Ignatius of St Paul Spencer, C.P., and the prayers of the Irish for the conversion of England | Cunningham, John M. | Article in Journal | | 2024 |
| A letter from Thomas Russell, Baron Killough to the Duke of Bedford in 1856 | McCormick, Finbar | Article in Journal | | 2002 |
| A letter from W. F. Wakeman to James Graves in 1882 | De hÓir, Siobhán | Article in Journal | | 1990 |
| A letter home to Foxrock from the Boer War | Farrell, Ted | Monograph or Collective Volume | Foxrock Local History Club | 2011 |
| A Letter of 1798 | Anonymous | Article in Journal | | 1990 |
| A letter of Father William Phelan, 1786 | Byrne, Cyril J. | Article in Journal | | 1986 |
| A letter of Nicholas Slevin, 1817 | Ó Súilleabháin, Pádraig | Article in Journal | | 1968 |
| A letter of Roger Casement (1888) in the Sanford collection | Thompson, Brooks | Article in Journal | | 1962 |
| A letter to a Castledermot emigrant | Wall, Michael J. | Article in Journal | | 1997 |
| A letter to Canada | Byrne, Declan | Article in Journal | | 1995 |
| A letter to Lord Monteagle | Anonymous | Article in Journal | | 1990 |
| A monstrance for St Macartan's cathedral | King, Richard Enda | Article in Book | | 1998 |
| A new Edmund Burke letter from 1778 | Walsh, Patrick | Article in Journal | | 2009 |
| A new letter of Swift to Marcus Antonius Morgan, July 1735 | Rousseau, George Sebastian | Article in Journal | | 1970 |
| A note on the papers of Richard Mulcahy | Holland, Ailsa C. | Article in Journal | | 1973 |
| A Pádraig Pearse letter | Pearse, Patrick Henry, 1879-1916 | Article in Journal | | 1991 |
| A pastoral instruction in the Irish language from the Right Rev. Gerald Teahan, bishop of Kerry to his diocesans in 1794 | | Article in Journal | | 1939 |
| A petition from Edward Sarsfield sixth viscourt Kilmallock to King George II | McDonnell, Hector | Article in Journal | | 1997 |
| A postscript to Canada | Byrne, Declan | Article in Journal | | 1996 |
| A record of a young man’s civil war in the west of Ireland | Cooke, Francis | Article in Journal | | 1996 |
| A rediscovered letter of Sylvester O'Halloran to Dr de Salis | Lyons, Claire E. | Article in Journal | | 2007 |
| A sad emigrant letter | | Article in Journal | | 1998 |
| A Scotch-Irish immigrant writes home | Doak, William | Article in Journal | | 1994 |
| A selection from the Hay correspondence | Sweetman, William | Article in Journal | | 2003 |
| A short-title calendar of the papers of Archbishop Daniel Murray : Irish College, Paris, Part 2 (1814-1852) | Sheehy, David C. | Article in Journal | | 2006 |
| A short-title calendar of the papers of Archbishop Michael Slattery in Archbishop's House, Thurles : Part 7, 1853-6 | Tierney, Mark | Article in Journal | | 2006 |
| A short-title calendar of the papers of Archbishop Thomas William Croke in Archbishop's House, Thurles : 2, 1886-1890 | Tierney, Mark | Article in Journal | | 1973 |
| A short-title calendar of the papers of Archbishop Thomas William Croke in Archbishop's House, Thurles : part 1, 1841-1885 | Tierney, Mark | Article in Journal | | 1971 |
| A short-title catalogue of the papers of Archbishop Michael Slattery in Archbishop's house, Thurles. Part 3, 1846 | Tierney, M. | Article in Journal | | 1991 |
| A social aspect of older times | Griffith, Bill | Article in Journal | | 2010 |
| A soldier's letter home | Ó Muirithe, Diarmaid | Article in Journal | | 1990 |
| A soldier's letter home, 1863-1874 | Ó Danachair, Caoimhín, 1913-2002 | Article in Journal | | 1957 |
| A Tipperary emigrant's manuscript | Ó Macháin, Pádraig | Article in Journal | | 2013 |
| A Victorian historian : private letters of W.E.H. Lecky, 1859-78 | | Monograph or Collective Volume | | 1947 |
| A Victorian historian : private letters of W.E.H. Lecky, 1859-78 | Hyde, Harford MontgomeryLecky, William Edward Hartpole, 1838-1903 | Monograph or Collective Volume | Home & Van Thal | 1947 |
| A visit to Hawthorn Lodge and Castlebar 1899. A letter from Emilius St Clair O'Malley to his brother Edward Loughlin O'Malley | Dunlop, Anne O'Malley | Article in Journal | | 2014 |
| A voice from the past : the Inishfree letters | Ua Cnáimhsí, Pádraig | Article in Journal | | 2000 |
| A Westmeath family at the Western Front : the Purdons of Lisnabin | Whiteside, Lesley | Article in Journal | | 2017 |
| A window on the past | Cunningham, Jennifer | Article in Journal | | 1996 |
| A young Irishman who was prepared to give a good account of himself | Behan, TonyLecane, Philip, | Article in Journal | | 2011 |
| A young woman's life in Edwardian Dublin | Wilson, Ann | Article in Journal | | 2014 |
| Absent friends : the letters of Jacques Richier de Cérisy to Élie Bouhéreau | Whelan, Ruth | Article in Book | | 2013 |
| Achill : September 14, 1852 | Martineau, Harriet, 1802-1876 | Article in Journal | | 1998 |
| Across the waves | Dwyer, T. Ryle | Monograph or Collective Volume | Mercier Press | 2002 |
| Additional Patrick Darcy papers, part 2 : correspondence, legal opinions and the mortgage of Galway's prize wines, 1631-58 | McGrath, Bríd | Article in Journal | | 2025 |
| Additional Patrick Darcy papers: correspondence and legal opinions, 1632, 1661-2; presented by Bríd McGrath | Darcy, Patrick, 1598-1668 | Article in Journal | | 2017 |
| Against the tide : a calendar of the papers of J.B. Armour, Irish Presbyterian minister and Home Ruler | | Monograph or Collective Volume | | 1985 |
| Against the tide : a calendar of the papers of Rev. J. B. Armour, Irish Presbyterian minister and Home Ruler, 1869-1914 | Armour, J. B.McMinn, J. R. B. | Monograph or Collective Volume | Public Record Office of Northern Ireland | 1985 |
| Allen Leeper's Letters Home, 1908-1912: An Irish-Australian at Edwardian Oxford | Leeper, Alexander Wigram Allen, 1887-1935 | Monograph or Collective Volume | Cambridge University Press for the Royal Historical Society | 2024 |
| An abridged transcript of the Ordnance Survey Letters relating to the parishes in, or partly in, the Barony of Dunkellin, Co. Galway; with prefatory note | Holt, E. W. L. | Article in Journal | | 1909 |
| An Anglo-Irish dialogue : a calendar of the correspondence between John Foster and Lord Sheffield, 1774-1821 | | Monograph or Collective Volume | Public Record Office of Northern Ireland | 1976 |
| An Eighteenth-Century Intellectual Friendship : Letters of Richard Lovell Edgeworth and the Wedgwoods | Doherty, Francis | Article in Journal | | 1986 |
| An emigrant's letter found during renovations to a house in Cushendall | | Article in Journal | | 1997 |
| An introduction to sources on Nano Nagle | O'Farrell, Pius | Article in Journal | | 2005 |
| An Irish artist goes to Bath : letters form the John Warren to Andrew Caldwell, 1776-1784 | | Article in Journal | | 1999 |
| An Irish battalion at war : from the letters of Captain J. H. M. Stanifort, 7th Leinsters, 1914-18 | Denman, Terence | Article in Journal | | 1989 |
| An Irish friend and the American civil war : some letters of Frederic W. Pim to his father in Dublin, 1864 | Willauer, G. J. | Article in Journal | | 1972 |
| An Irish Friend and the Civil War | Large, David | Article in Journal | | 1958 |
| An Irish immigrant housewife on the New York frontier | White, Philip L. | Article in Journal | | 1967 |
| An Irish missionary in Pretoria | McCormack, Barbara | Article in Book | | 2015 |
| An Irish papal zouave in 1870 | Teeling, Bartholomew | Article in Journal | | 1958 |
| An Irish Rose in Texas | Lynch, Muireann | Article in Journal | | 1993 |
| An Irish schoolmaster's letter | O'Reilly, Vincent Fleming | Article in Journal | | 1924 |
| An Irish textual critic and the Carmen paschale of Sedulius : Colmán's letter to Feradach | Sharpe, Richard | Article in Journal | | 1992 |
| An Irishman's report on France, 1787 | | Article in Journal | | 1964 |
| An O'Dempsey letter | Goode, P.J.
| Article in Journal | | 2014 |
| An tAthair Peadar agus 'Beirt Fhear': Cairdeas agus comhfhreragras | Ní Loingsigh, Katie | Article in Journal | | 2017 |
| An tAthair Peadar: scéal a phápéirí féin go nuige seo | Ó Dúshláine, Tadhg | Article in Book | | 2015 |
| An tOileánach agus an Déiseach | Ó hAirt, Diarmaid | Article in Journal | | 2010 |
| An Ulster slave-owner in the revolutionary Atlantic : the life and letters of John Black | Wright, Jonathan Jeffrey | Article in Book | Four Courts Press | 2019 |
| An Ulsterman in early industrial America : letters of James Wightman, 1821-1824 | Faris, Mary J.MacMaster, Richard K. | Article in Journal | | 2001 |
| An unfortunate country : images of Ireland as contained in Irish - New Zealand correspondence 1840-1937 | McCarthy, Angela, 1971- | Article in Book | | 2004 |
| An unhappy visit to Castle Bernard, Castlemartyr, 9-14 December 1791 | Ní Chonaill, Áine | Article in Journal | | 2013 |
| An unpublished letter from Swift | Thompson, P. V. | Article in Journal | | 1967 |
| Andreas Steinhuber's 'Votum' for the Holy Office, Rome, concerning the Irish Boycotting and the Plan of Campaign (with translation) | Belletti, Alberto | Article in Journal | | 2021 |
| Andrew O'Sullivan - an unlikely patriot | Myers, Kevin | Article in Journal | | 2018 |
| Anglo-Irish Politics, 1680-1728: The Correspondence of the Brodrick Family of Surrey and County Cork | Brodrick, Alan (c.1655–1728), 1st Viscount Midleton et al. | Monograph or Collective Volume | Wiley-Blackwell | 2023 |
| Apostolic letter of Pope Benedict XV to Cardinal Logue | Benedict XV, Pope | Article in Journal | | 1942 |
| Archbishop Carpenter's epistolae 1770-80 | | Article in Journal | | 1956 |
| Archbishop James Ussher (1581-1656) and the Dutch Vossius family | Rademaker, Cornelis Simon Maria, 1930- | Article in Journal | | 2006 |
| Arthur Bennett's correspondence with Robert S. MacAdam | Ó Mórdha, Séamus | Article in Journal | | 1957 |
| At home with the emigrants : the role of emigrants' letters in locating family homes | Parkhill, Trevor | Article in Journal | | 1984 |
| Autobiographical sketch of Governor Charles J. McCarthy of Hawaii | McCarthy, Charles J. | Article in Journal | | 1921 |
| Back to bonnie Kellswater : an 1889 Australian migrant letter | Dunlop, Eull | Article in Journal | | 1989 |
| Bagenalstown C.Y.M.S. and the M.P.s billiard table | Anonymous | Article in Journal | | 1993 |
| Bailiúchán Thórna: Comhfhreagras ó na Déise | Ní Ghearbhaigh, Ailbhe | Article in Journal | | 2017 |
| Ballinlough, Co. Roscommon: Memoirs, Facts and Folklore from the 19th and Early 20th Century | | Monograph or Collective Volume | Lettertec | 2020 |
| Ballygerdra boundary disputes | Hoyne, Liam | Article in Journal | | 1991 |
| Becoming Irlandés : Private Narratives of the Irish Emigration to Argentina (1844–1912) | Murray, Edmundo | Monograph or Collective Volume | Literature of Latin America | 2006 |
| Bedell's old testament | | Article in Journal | | 1942 |
| Beginnings | Sweeney, Pádraig | Article in Journal | | 1998 |
| Belfast in 1738 | Paterson, T. G. F. | Article in Journal | | 1939 |
| Belfast, boys and books : the friendship between Forrest Reid and Knox Cunningham | Walker, Graham | Article in Journal | | 2007 |
| Bere Island and Berehaven 1803-05 | Kerrigan, Paul M. | Article in Journal | | 1998 |
| Berkeley's letters to Le Clerc | Bellenare, PierreRaynor, David | Article in Journal | | 1989 |
| Betsy Sheridan's journal : letters from Sheridan's sister 1784-1786 and 1788-1790 | Le Fanu, WilliamSheridan, Betsy | Monograph or Collective Volume | Eyre & Spottiswoode | 1960 |
| Between comrades : James Connolly : letters and correspondence | Connolly, James, 1868-1916 | Monograph or Collective Volume | Gill & Macmillan | 2007 |
| Big houses under threat | Browne, Geoffrey Henry, 3rd Baron Oranmore and Browne, 1st Baron Mereworth, 1861-1927, born Browne-Guthrie, Geoffrey Henry | Article in Book | | 2016 |
| Bishop Robert Walsh, the friars, and Edmund Ignatius Rice, 1817 | Fennessy, Ignatius | Article in Journal | | 1996 |
| Boulter and his letters | McNally, Paddy | Article in Book | | 2016 |
| Breakey letters : correspondence, 1843-47, from William Breakey to Humphrey Thomson Breakey | Clerkin, Pádraig | Article in Journal | | 2003 |
| Brenan, Carew, and their ecclesiastical histories | Ó Súilleabháin, Pádraig | Article in Journal | | 1964 |
| Brennan letters from Dunmore to Australia | Bermingham, Hubert | Article in Journal | | 1996 |
| British and American Abolitionists : An Episode in Transatlantic Understanding | | Monograph or Collective Volume | | 1974 |
| Broken landscapes : selected letters of Ernie O'Malley and Nicholas Allen : afterword by David Lloyd | O'Malley, Ernie (Ernest Bernard), 1897-1957 | Monograph or Collective Volume | Lilliput Press | 2011 |
| Brothers in arms | Goodman, John | Article in Journal | | 2014 |
| Bryan Lefferty and his letter to congress, 1776 | O'Dwyer, George Francis | Article in Journal | | 1922 |
| Calendar of Bray papers | Meagher, Claude | Article in Journal | | 1970 |
| Calendar of entries in the papal register relating to Great Britain and Ireland : papal letters, vol. 15, Innocent VIII : Lateran registers 1484-1492 | | Monograph or Collective Volume | Stationery Office for the Irish Manuscripts Commission | 1978 |
| Calendar of entries in the papal registers relating to Great Britain and Ireland | Anonymous | Monograph or Collective Volume | HMSO | 1955 |
| Calendar of entries in the papal registers relating to Great Britain and Ireland, papal letters, vol XX, 1513-1521 | NA | Monograph or Collective Volume | Irish Manuscripts Commission | 2005 |
| Calendar of entries in the papal registers relating to Great Britain and Ireland. Vol. 13, parts 1-2 | | Monograph or Collective Volume | [s.n.] | 1955 |
| Calendar of letters and state papers relating to English affairs, 1558-1603 | Anonymous | Monograph or Collective Volume | [s.n.] | 1892 |
| Calendar of letters, despatches, and state papers relating to the negotiations between England and Spain, 1485-1558 | Anonymous | Monograph or Collective Volume | [s.n.] | 1862 |
| Calendar of State Papers relating to Ireland. James I. 5 vols. | | Monograph or Collective Volume | [HMSO] | 1872 |
| Calendar of state papers, Ireland, Tudor period 1571-1575 | | Monograph or Collective Volume | Irish Manuscripts Commission & Public Record Office | 2000 |
| Calendar of state papers, Ireland: Tudor Period, 1509-1547 | NA | Monograph or Collective Volume | Irish Manuscripts Commission | 2017 |
| Calendar of the close rolls ... 1271-[1509] | Public Record Office | Monograph or Collective Volume | | 1892 |
| Calendar of the letters of the Butler archbishops of Cashel (1750-92) | Donovan, Imelda | Thesis | | 1970 |
| Calendar of the state papers relating to Ireland [in the reign of Charles II] preserved in the Public Record Office. 1660-(70), with addenda, 1625-70. 4 vols. | | Monograph or Collective Volume | [HMSO] | 1905 |
| Calendar of volume 13 of the "Fondo di Vienna" in propaganda archives : part 2, ff. 201-401 | Millett, Benignus | Article in Journal | | 1983 |
| Calendar of volume 13 of the "Fondo di Vienna" in propaganda archives : part 3, ff. 402-522 | Millett, Benignus | Article in Journal | | 1984 |
| Calendar of volume 14 of the 'Fondo de Vienna' in propaganda archives, part 1, ff 1-131 | Millett, Benignus | Article in Journal | | 1987 |
| Calendar of volume 14 of the Fondo di Vienna in Propaganda Archives : part 3, ff. 284-395 | | Article in Journal | | 1990 |
| Canon Sheehan | Forde, R. | Article in Journal | | 1980 |
| Canon Sheehan - unpublished manuscripts | Forde, R. | Article in Journal | | 1995 |
| Canon Sheehan, from unpublished letters | Forde, Robert | Article in Journal | | 1986 |
| Captain Frank Hurley (1891-1921). 3rd West Cork Brigade Irish Republican Army | Mahony, Greg | Article in Journal | | 2023 |
| Captain Hon. William Leslie (1751-77) : his life, letters and commemoration | Gilchrist, Marianne M.Leslie, William, 1751-1777 | Article in Book | | 2005 |
| Captain John McDonnell and his British prisoners | O'Dwyer, George F. | Article in Journal | | 1918 |
| Captain Rock | Dunne, Terry | Article in Book | | 2016 |
| Captain Rock, night errant : the threatening letters of pre-famine Ireland, 1801-1845 | Gibbons, Stephen Randolph | Monograph or Collective Volume | Four Courts | 2004 |
| Casement in Germany : a guide to the Roger Casement papers in Clare County Archives | Berry, Róisín | Monograph or Collective Volume | Clare County Council | 2005 |
| Catalogue of Irish material in fourteen volumes of the Scritture originali riferite nelle congregazioni generali in Propaganda archives | | Article in Journal | | 1969 |
| Catalogue of letters relating to the Queen's Colleges, Ireland, 1845-50, in the papers of Archbishop Michael Slattery at Thurles | Tierney, Mark | Article in Journal | | 1966 |
| Catalogue of the papers of Dr Denis Conway (1722-96) in Limerick Diocesan Archives [with index] | Bracken, David | Article in Journal | | 2016 |
| Catalogue of the papers of Dr John Young, bishop of Limerick [1746-1813) held in the Limerick Diocesan Archives [with index] | Bracken, David | Article in Journal | | 2015 |
| Catholic Association papers in the Dublin Diocesan archives | O'Higgins, Fergus | Article in Journal | | 1984 |
| Catholicism in the province of Armagh, 1603-1641 | Mac Cuarta, Brian | Thesis | | 2004 |
| Charles Lever; his life in his letters. 2 vols. | Downey, Edmund | Monograph or Collective Volume | | 1906 |
| Cholera in Tonytallagh townland in Currin 1834 | Mac Annaidh, Séamas | Article in Journal | | 1997 |
| Christmas greetings from Seamus Heaney | Crowder, Ashby Bland | Article in Journal | | 2017 |
| Christy Brown's women : a biography drawing on his letters : includes the founding of Cerebral Palsy Ireland by Robert Collis | Jordan, Anthony J. | Monograph or Collective Volume | Westport Books | 1998 |
| Chronological annotations to 250 letters of Thomas Moore | Pearsall, Robert Brainard | Article in Journal | | 1969 |
| Clancarthy correspondence, 1785-1861 | | Article in Journal | | 1994 |
| Clanricard letters : letters and papers 1605-1673, preserved in the National Library of Ireland, manuscript 3111 | | Article in Journal | | 1996 |
| Clements on Claytons | Gamble, N. E. | Article in Journal | | 2007 |
| Clonmacnois by Beranger, 1779 | | Article in Journal | | 1973 |
| Cobbett in Ireland : a warning to England | Cobbett, William, 1763-1835Knight, Denis | Monograph or Collective Volume | Lawrence and Wishart | 1984 |
| Collected letters, 1874-1897 | Lawrence, Dan H.Shaw, George Bernard, 1856-1950 | Monograph or Collective Volume | Max Reinhardt | 1965 |
| Comhfhreagras Corcaíoch | Buttimer, Neil | Article in Book | | 2013 |
| Comparative philology and mythology : the letters of Whitley Stokes to Adalbert Kuhn | Maier, Bernhard | Article in Book | | 2011 |
| Con Colbert | Augustine,OFM | Article in Journal | | 1942 |
| Conflict, politics and patronage in late eighteenth century Armagh: a study of the correspondence of Edward Hudson, Church of Ireland Minister, Forkhill, 1789-1795 | Behan, Janine Elaine | Article in Journal | | 2016 |
| Confounding the Garibaldian liars : the letters of Albert Delahoyde, Irish soldier of the Papal Battalion of St Patrick and Papal Zouave in Italy, 1860-1870. | O’Driscoll, Florry | Article in Journal | | 2016 |
| Contentious county Carlow land surveyors | Law, Edward J. | Article in Journal | | 1997 |
| Convergent opposites : the correspondence of the Irishmen George Gabriel Stokes and John Tyndall | McMillar, N. D. | Article in Journal | | 2000 |
| Copley papers : correspondence and papers of Elizabeth Mary Copley (c.1801-1887), sister of Maria, Countess Grey, and supporter of Protestant charitable missions in Ireland and Syria | | Monograph or Collective Volume | Durham University Library | 1997 |
| Correspondance romaine de l'anti-janséniste Francoise Porter | Ceyssens, Lucien | Article in Journal | | 1964 |
| Correspondence | Lewis, Wilmarth SheldonWalpole, Horatio, 4th earl of Orford, 1717-1797 | Monograph or Collective Volume | Oxford University Press | 1961 |
| Correspondence | Weedle, Herman | Article in Journal | | 1998 |
| Correspondence | Aylmer, Algernon A. | Article in Journal | | 1910 |
| Correspondence : emigrants and inner exiles | Heaney, Seamus | Article in Book | | 1990 |
| Correspondence between Bishop O'Dwyer and Bishop Foley on the Dublin Rising, 1916-17 | O'Callaghan, Edward P. | Article in Journal | | 1978 |
| Correspondence between J. H. Newman and Archbishop Leahy on the sale of University Church, Dublin, 1857-1864 | Tierney, Mark | Article in Journal | | 1964 |
| Correspondence between the Rt. Hon. William Pitt and Charles, Duke of Rutland | Anonymous | Monograph or Collective Volume | [s.n.] | 1890 |
| Correspondence concerning the disestablishment of the Church of Ireland, 1862-1869 | Tierney, Mark | Article in Journal | | 1969 |
| Correspondence concerning the system of national education between archbishop Daniel Murray of Dublin and bishop George J. Browne of Galway | | Article in Journal | | 1979 |
| Correspondence of Abp Carpenter, with BP Sweetman of Ferns | Curran, Michael | Article in Journal | | 1956 |
| Correspondence of Charles Darwin on James Torbitt's project to breed blight-resistant potatoes | DeArce, M. | Article in Journal | | 2008 |
| Correspondence of Charles, first Marquis Cornwallis | | Monograph or Collective Volume | | 1859 |
| Correspondence of Daniel O'Connell in the Limerick Chamber of Commerce letter books (1829-30) | McElroy, Martin | Article in Journal | | 2009 |
| Correspondence of Emily, Duchess of Leinster (1731-1814). Vol. 1, Letters of Emily, Duchess of Leinster, 1731-1814; James, 1st Duke of Leinster; Caroline Fox, Lady Holland; vol. 2, Letters of Lord Edward Fitzgerald and Lady Sarah Napier (née Lennox); vol. 3, Letters of Lady Louisa Conolly and William, marquis of Kildare (2nd duke of Leinster) | | Monograph or Collective Volume | The Stationery Office [for the Irish Manuscripts Commission] | 1957 |
| Correspondence of Fr. Ludovico Mansoni, S. J., papal nuncio to Ireland | | Article in Journal | | 1953 |
| Correspondence of Irish interest in the Lettere in Propaganda Archives : vols. 27-34 (1649-64) | Millett, Benignus | Article in Journal | | 1988 |
| Correspondence of Irish interest in the Lettere in Propaganda Archives, vol. 38 (1657-1664) | | Article in Journal | | 1990 |
| Correspondence of the lexicographer Thomas Connelly OP (1783-93) in the Archivio General de Simancas | Bergman, Ted | Article in Journal | | 2010 |
| Correspondence of the Right Hon. John Beresford, illustrative of the last thirty years of the Irish parliament. 2 vols. | | Monograph or Collective Volume | | 1854 |
| Correspondence of the superiors of the Jesuit mission in Ireland with John O'Brien, S.J., rector of Salamanca | | Article in Journal | | 1965 |
| Correspondencia entre la Nunciatura en Espana y la Santa Sede, reinado de Felipe III (1598-1621). Vols 5-6 | | Monograph or Collective Volume | Iglesia Nacional Española | 1966 |
| Cosmopolitan insights from early Irish-American letter networks | Orr, Jennifer | Article in Book | | 2024 |
| County Longford eyewitness accounts of World War I | Leahy, David | Article in Journal | | 2008 |
| Crossmaglen famine letters to America | McCreane, Eamon | Article in Journal | | 2004 |
| Crusaders for Liberty or Vile Mercenaries? : The Irish Legion in Colombia | Brown, Matthew | Article in Journal | | 2006 |
| Culdaff Letter 1777 | Mills, George | Article in Journal | | 2022 |
| D. D. Sheehan : why he left Cork in 1918 : a correspondence "The Corkman" | | Monograph or Collective Volume | Aubane Historical Society | 2003 |
| Dánta comhfreagrais Mhichíl Óig | Ó Conchúir, Breandán | Article in Book | | 2018 |
| Dean of St Patrick's : a view from the letters | Holloway, John | Article in Book | | 1968 |
| Dear Mr Darwin | Nelson, E. Charles | Article in Journal | | 2005 |
| Dear Richard : letters to an Irish immigrant, 1865-1925 | Aggeler, Maureen | Monograph or Collective Volume | Xibris Corp. | 2001 |
| Dear son if you are my son | Flatman, Richard | Article in Journal | | 1988 |
| Dear uncle : immigrant letters to Antrim from the U.S.A., 1843-1852 : the Kerr letters with accompanying notes on their background | | Monograph or Collective Volume | Antrim & District Historical Society | 1991 |
| Departure and exile in the Drelincourt correspondence | McKee, Jane | Article in Book | | 2013 |
| Derry in the time of George I : selections from Bishop Nicolson's letters, 1718-22 | | Article in Journal | | 1954 |
| Desolate and far from home | Graham, Colin | Article in Journal | | 1997 |
| Devenir irlandés : narrativas íntimas de la emigración irlandesa a la Argentina (1844-1912) | | Monograph or Collective Volume | EUDEBA | 2004 |
| Dhá Litir Neamh-Fhoilsithe ón bPiarsach | Andrews, AnneÓ Donabháin, Peadar | Article in Journal | | 1975 |
| Diary and correspondence of Charles Abbot, Lord Colchester | | Monograph or Collective Volume | [s.n.] | 1861 |
| Document study. The fiery cross and letters from James Larkin junior | Deasy, Joe | Article in Journal | | 1996 |
| Document. A missing letter by Edmund Burke dated 7 November 1761 | Kelly, James, 1959- | Article in Journal | | 2014 |
| Document: Letter of Frederick H. Armitage of Noan to his family following the IRA killing of estate employee David Cummins | Marnane, Denis G. | Article in Journal | | 2024 |
| Documents : 1 : William Carleton writes to Rev. Dr Murray; 2 : two letters from a Clones emigrant [Patrick J. Murrray, 1870, 1871] | Ó Gallachair, Pádraig | Article in Journal | | 1962 |
| Documents : Frederick Douglass in Ireland | Douglass, Frederick, 1818-1895 | Article in Journal | | 1923 |
| Documents and correspondence concerning and from James Foran, Irish priest and chaplain in the Falkland Islands 1876-86 | Walsh, Edward | Article in Journal | | 2005 |
| Documents and sources. The Cheney letters, 1682-85 | Dudley, Rowena | Article in Journal | | 1996 |
| Documents from Dungannon : some letters of Hugh O'Neill | | Article in Journal | | 1993 |
| Documents on social life : four letters from the Wilson-Lynch papers | Mac Lochlainn, Alf, 1926- | Article in Journal | | 1989 |
| Domesticity and romance in early Victorian Ulster : peeps into a non-subscribing Presbyterian past | McLachlan, J. | Article in Journal | | 1986 |
| Dominick Street : a Bellocian connection | Reynolds, Brian | Article in Journal | | 1991 |
| Donal O'Sullivan Beare to King Philip III, 20th February 1602 | | Article in Journal | | 1952 |
| Douglas Hyde’s International Impact and Influence: Evidence from his Postcard Correspondence and Memoir | Lyons, Fiona | Article in Book | Ollscoil na hÉireann | 2023 |
| Down but not out in late eighteenth-century Philadelphia : the begging letters of Irish immigrants | Higgins, Padhraig | Article in Journal | | 2019 |
| Dr George Clarke : letters and autobiography | Clarke, George | Article in Journal | | 1990 |
| Dr Johnson and the Irish | Rudd, Niall | Article in Journal | | 2009 |
| Dr. James Donnelly's letters to his Roman agent 1861-92 | | Article in Journal | | 1982 |
| Dr. Patrick Browne and Dr. Joseph Banks : a letter about a 'lost' Irish flora | Nelson, E.C. | Article in Journal | | 2006 |
| Dr. Samuel Madden, Dr. Johnson and Benjamin Franklin | Lewis, Frank R. | Article in Journal | | 1939 |
| Dramatic elements in Swift's journal to Stella | Smith, Frederik N. | Article in Journal | | 1968 |
| Dryden's letter to 'Ormond' | Legouis, Pierre | Article in Journal | | 1951 |
| Dublin Castle and the first Home Rule Bill : the Jenkinson - Spencer correspondence | McGee, Owen | Article in Journal | | 2007 |
| Dublin Diocesan Archives : Hamilton papers (10) | Purcell, Mary | Article in Journal | | 1999 |
| Dublin Diocesan Archives : Hamilton papers (2) | Hamilton, JohnPurcell, Mary | Article in Journal | | 1990 |
| Dublin Diocesan Archives : Hamilton Papers (4) | Purcell, Mary | Article in Journal | | 1993 |
| Dublin Diocesan Archives : Hamilton Papers (5) | Purcell, Mary | Article in Journal | | 1994 |
| Dublin Diocesan Archives : Hamilton Papers (8) | Purcell, Mary | Article in Journal | | 1997 |
| Dublin Diocesan archives : Murray papers (4) | Purcell, Mary | Article in Journal | | 1984 |
| Dublin to Boston, 1719 | Hunter, R. J. (Robert J.) | Article in Journal | | 1971 |
| Early letters of John Farley (1861-1864) | McConville, Kieran
| Article in Journal | | 2013 |
| Earnest men: two Victorian contemporaries | Roberts, Gerald | Article in Journal | | 2013 |
| Easter 1916 : an inside report on Ulster | Martin, F. X. (Francis Xavier), 1922-2000 | Article in Journal | | 1986 |
| Easter Rising 1916 : Count Plunkett's letter to Pope Benedict XV | De Wiel, Jérome aan | Article in Journal | | 2004 |
| Eating Abroad, Remembering Home: Food Parcels, 1845–1960 | Mulcahy, John D. | Article in Book | Royal Irish Academy | 2024 |
| Editor Moore to Playwright Hyde : on the making of 'The tinker and the fairy' | Dunleavy, Gareth W.,Dunleavy, Janet Egleson | Article in Journal | | 1973 |
| Edmund Burke and his kinsfolk in the Blackwater valley as seen through his letters | Coughlan, A. J.O'Reilly, F. D. | Article in Journal | | 1994 |
| Edmund Burke, New York agent : with his letters to the New York Assembly, and intimate correspondence with Charles O'Hara, 1761-1776 | | Monograph or Collective Volume | American Philosophical Society | 1956 |
| Edmund Rice (1762-1844) : apostle of modernisation | Keogh, Dáire | Article in Journal | | 1996 |
| Edward Roth's letter from Kilkenny 1662 | Tierney, Ann | Article in Journal | | 2017 |
| Ein Junge aus Hamburg im viktorianischen Schottland : Kuno Meyers briefe an die familie, 1874-1876 | Meyer, Kuno | Monograph or Collective Volume | Ergon | 2016 |
| Ein unbekannter Brief von Ernst Windisch aus der Pokorny-Bibliothek in Freiburg/Schweiz | Ó Dochartaigh, Pól | Article in Journal | | 2004 |
| Emigrant letters | McGinty, Margaret | Article in Journal | | 1995 |
| Emigrant letters. 'I take up my pen to write these few lines'. | Fitzpatrick, David | Article in Journal | | 1994 |
| Emigrants from Ulster meet the observer's paradox : a typology of emigrant letter writers | Montgomery, Michael | Article in Journal | | 2003 |
| Emigrants' letters | Boardman, ElizabethTopley, AbrahamTopley, Isaac | Article in Journal | | 1991 |
| Emigration from County Down, 1840-1871 | McErlane, Eleanor | Monograph or Collective Volume | Ulster American Folk Park | #|- |
| England, Ireland, Scotland, and Wales : documents, 1541-1562 | Lukács, LászlóMcCoog, Thomas M. | Monograph or Collective Volume | Institutum Historicum Societatis Iesu | 2000 |
| Episcopal edicts of the Diocese of Ossory in the eighteenth century, I : the edicts of Thomas Burke (1709-1776). | Ó Fearghail, Fearghus | Article in Journal | | 2006 |
| Epistola Lentuli | | Article in Book | | 1995 |
| Epistolary and emotional education : the letters of an Irish father to his daughter, 1747-1752 | Ruberg, Willemijn | Article in Journal | | 2008 |
| Epistolary forms : published correspondence, letter journals and books | Williams, Abagail | Article in Book | | 2013 |
| Ernie O'Malley autobiographical letter | O'Malley, Ernie (Ernest Bernard), 1897-1957 | Article in Journal | | 1989 |
| Essex papers, 1 : 1672-1679 | | Monograph or Collective Volume | | 1890 |
| Essex papers, Vol. 1-2 | | Monograph or Collective Volume | [s.n.] | 1913 |
| Eugene O'Curry's early life : details from the unpublished letter | Herity, Michael | Article in Journal | | 1967 |
| Evictions : townland of Moneygall and Commons Co. Kilkenny | Flatman, Richard | Article in Journal | | 1998 |
| Exploring transnational and diasporic families through the Irish emigration database | Fitzgerald, Patrick | Article in Journal | | 2008 |
| Extracts from the papers of the late Dr Patrick McCartan | McCartan, Patrick | Article in Journal | | 1964 |
| Facsimiles by reflex process of printed works, 1 : Négociations de M. le comte d'Avaux en Irlande, 1689-90. With introduction by James Hogan | Anonymous | Monograph or Collective Volume | | 1934 |
| Faith and fatherland or queen and country? : an unpublished exchange between O'Neill and the state at the height of the Nine Years War | Morgan, Hiram | Article in Journal | | 1994 |
| Family letters of Robert Haly, S.J., 1838-68 | Laheen, Kevin A. | Article in Journal | | 2001 |
| Famine echoes | | Monograph or Collective Volume | Gill & Macmillan | 1995 |
| Famine letters | Snell, K. D. M.Somerville, Alexander | Article in Journal | | 1995 |
| Father Yorke on Father O'Growney | Yorke, Peter | Article in Journal | | 1964 |
| Fearganainm Ó Dálaigh | Ó Muireadhaigh, Réamonn | Article in Journal | | 1962 |
| Figures de l’émigration dans les Lettres écrites de Barcelone de Pierre-Nicolas Chantreau (1792) | Tatin-Gourier, Jean-Jacques | Article in Book | | 1995 |
| Five letters relating to Galway smuggling in 1737 | Cullen, L. M. (Louis Michael) | Article in Journal | | 1959 |
| Foedera, conventiones, litterae, et cujuscunque generis acta publica inter reges Angliae et alios quosvis imperatores, reges, pontifices, principes, vel communitates ab ... 1066 ad nostra usque tempora habita ut tractata | | Monograph or Collective Volume | [s.n.] | 1869 |
| Fontenay and other letters | | Article in Journal | | 1949 |
| Food, Feast and Famine in the Correspondence of Daniel O’Connell | Neville, Grace | Article in Book | Royal Irish Academy | 2024 |
| Fostering an Irish identity through art: a letter from Sylvester O'Halloran (1728-1807) to James Barry (1741-1806) in May 1791 | Lyons, Claire E. | Article in Journal | | 2010 |
| Four letters originally written in French, relating to the kingdom of Ireland | Anonymous | Monograph or Collective Volume | [s.n.] | 1739 |
| Four unpublished letters from Aquilla Smith to the Cork numismatist Richard Sainthill | Dolley, Michael | Article in Journal | | 1972 |
| Fr Francis Leynagh's letter (1725) | Ó Háinle, Cathal G. | Article in Journal | | 2005 |
| France and Ireland in the late eighteenth century: the correspondence of Charles Coquebert de Montbret and Andrew Caldwell, 1791-1803 | Caldwell, Andrew, 1732-1808Coquebert de Montbret, Charles-Etienne, 1755-1831 | Article in Journal | | 2018 |
| Francis Le Jau's letters to William King 1655-1704 | Matteson, Robert S. | Article in Journal | | 1978 |
| Franciscan library, MS A. 30.4 | | Article in Journal | | 1940 |
| Franco-Irish correspondence : December 1688 - February 1692, 1 | | Monograph or Collective Volume | | 1983 |
| Francois Eugène de Vault : Memoire ou Extrait de la correspondence de la cour et des généreaux pendant la guerre en Irlande (1689-1691) | O'Malley, Sheila | Thesis | | 1954 |
| Frank Ryan : journey to the centre, | O'Loughlin, Michael | Monograph or Collective Volume | Raven Arts Press | 1987 |
| Fraternising with papists : an Anglican clergyman abroad | Finnegan, Rachel | Article in Book | | 2015 |
| From Bawn to Fredericksburg : the letters of John Cooke | Vaughan, Mary Ann | Article in Journal | | 2019 |
| From Belfast to Melbourne - an emigrant letter of 1854 | Hulme, John | Article in Journal | | 2012 |
| From Creggan to Louvain | Ó Fiaich, Tomás | Article in Journal | | 1956 |
| From Fintona to Wollongong, 1838 | McMahon, Theo | Article in Journal | | 1988 |
| From Gort to Australia and a letter home | Mahon, Patrick | Article in Journal | | 1994 |
| From indirect to direct comparison: Bohemian-Irish analogies in German and British travel writings, c. 1750-1850 | Power, Martina | Article in Book | | 2014 |
| From the archives : 'His Grace is not pleased' | McQuaid, John Charles, bishop, 1895-1973 | Article in Journal | | 1998 |
| From Tuam to Ballyspellan | Ó Fearghail, Feargus | Article in Journal | | 1987 |
| Further letters of Robert Haly, S.J., in the Irish Jesuit Archives | Laheen, Kevin A. | Article in Journal | | 2003 |
| Further notes on the genealogy and social history of the Carlow family of John Tyndall (1820-1893) | De Arce, MiguelElwick, JamesMcGing, DeirdreMcMillan, Norman.D.Nevin, MartinO'Riordan, Emma | Article in Journal | | 2013 |
| Gallipoli letters of Captain V.A. Acheson | Acheson, Peter | Article in Journal | | 2018 |
| Galway Corporation Book B | Blake, Martin J. | Article in Journal | | 1907 |
| Gentlemen-bishops and faction fighters : additional letters pertaining to Newfoundland catholicism, from the Franciscan library at Killiney, Ireland | Rollmann, Hans | Article in Journal | | 1988 |
| Gentlemen-bishops and faction fighters : the letters of bishops O Donel, Lambert, Scallan and other Irish missionaries | Byrne, Cyril J.Ó Donel, James Louis | Monograph or Collective Volume | Jesperson Press | 1984 |
| Gentry life in Georgian Ireland : the letters of Edmund Spencer (1711-1790) | | Monograph or Collective Volume | Legenda : Modern Humanities Research Association | 2017 |
| George Codan and the duke of Ormonde | Anonymous | Article in Journal | | 1987 |
| George Moore and some correspondents | | Article in Journal | | 1947 |
| Georgia by gaslight : glimpses of Macon from the letters of the city gas light superintendent, 1859-1862 | Owens, Jeffery Alan | Article in Journal | | 1992 |
| Glimpses of the famine in Mayo : the letters of a land agent, 1843-1849 | Lane, Pádraig | Article in Journal | | 1997 |
| Gothic memory and forgetfulness in Elizabeth Bowen's A World of Love and ‘The Demon Lover’ | Mayrer, Rachel | Article in Journal | | 2008 |
| Great grandfather's missing letter : door to a distant past | Egan, Patricia Colling | Article in Journal | | 1998 |
| Greeting the nation - The Irish Christmas Card | Breathnach, Teresa | Article in Journal | | 2016 |
| Grilling in Calcutta : Whitley Stokes, Henry Bradshaw and Old Welsh in Cambridge | Russell, Paul | Article in Book | | 2011 |
| Handbook and select calendar of sources for medieval Ireland in the National Archives in the United Kingdom | | Monograph or Collective Volume | Four Courts | 2005 |
| Hard times: an episode in the life of the Belfast portrait painter Samuel Hawksett | Black, Eileen | Article in Journal | | 2008 |
| Harpur letters from the front in the First World War | | Article in Journal | | 1997 |
| Henrietta Crowe of Kells | Litton, Helen | Article in Journal | | 2020 |
| Henry Montgomery's letter to Daniel O'Connell | Clifford, BrendanMontgomery, Henry | Monograph or Collective Volume | Brendan Clifford | 1992 |
| Historic document : Peter O'Neill-Crowley's last stand | | Article in Journal | | 1943 |
| Historical criticism of the 'Song of Dermot and the Earl' | O'Doherty, J. F. | Article in Journal | | 1938 |
| History in photographs and letters : the Waldron family and Co. Clare | De Bhaldraithe, Pádraig | Article in Journal | | 1993 |
| Home thoughts from abroad : the Australian letters of Thomas F. Culhane | Culhane, Thomas F., 1891-1969 | Monograph or Collective Volume | Glin Historical Society | 1998 |
| Hugh Boulter : a biographical sketch | Milne, Kenneth | Article in Book | | 2016 |
| Hurley letters. The Hurley emigrant letters | Foster, Marita | Article in Journal | | 1992 |
| Hutton of Hastings : the life and letters of William Hutton, 1801-61 | Boyce, Gerald E. | Monograph or Collective Volume | Hastings County Council | 1972 |
| Illustrating a sentimental journey : Kate O’Brien’s Farewell Spain | Davison, Jane | Article in Journal | | 2017 |
| In great haste : the letters of Michael Collins and Kitty Kiernan | Collins, Michael, 1890-1922Ó Broin, León, 1902-1990Ó hEigeartaigh, Cian | Monograph or Collective Volume | Gill & Macmillan | 1996 |
| In great haste : the letters of Michael Collins and Kitty Kiernan | Collins, Michael, 1890-1922Kiernan, KittyÓ Broin, León, 1902-1990 | Monograph or Collective Volume | Gill & Macmillan | 1983 |
| In great haste : the letters of Michael Collins and Kitty Kiernan | Ó Broin, León, 1902-1990 | Monograph or Collective Volume | Gill & Macmillan | 1996 |
| In memory of Lieutenant Tom Kettle, 'B company, 9th Royal Dublin Fusiliers | Burke, Tom | Article in Journal | | 2004 |
| Introduction | Eckerle, Julie A.McAreavey, Naomi | Chapter in Book | | 2019 |
| Irish Emigration and the Art of Letter-Writing | Fitzpatrick, David | Article in Book | | 2006 |
| Irish Franciscans ask Propaganda to give them books for their pastoral ministry in Ireland, 1689-96 | Millett, Benignus | Article in Journal | | 2003 |
| Irish Immigrants in the land of Canaan : Letters and memoirs from colonial and revolutionary America, 1675-1815 | Miller, Kerby A. | Monograph or Collective Volume | Oxford University Press | 2003 |
| Irish in Britain 1748 | Mahon, Thomas | Article in Journal | | 1966 |
| Irish Jesuit Annual Letters, 1604-1674 | | Monograph or Collective Volume | Irish Manuscripts Commission | 2019 |
| Irish Methodist notes | Bradshaw, D. B. (David Bigham)Crookshank, C. H. | Article in Journal | | 1910 |
| Irish migrants in New Zealand, 1840-1937 : "the desired haven" | McCarthy, Angela, 1971- | Monograph or Collective Volume | Boydell | 2005 |
| Irish schools for Canada : Arthur Buller to the bishop of Quebec, 1838 | Curtis, Bruce | Article in Journal | | 2001 |
| Irish voices from the American civil war | Irwin, Brett | Article in Journal | | 2015 |
| Irish women's letters | | Monograph or Collective Volume | Sutton Publishing | 1997 |
| Irish women's letters, 1641-1653 | Coolahan, Marie-Louise | Article in Book | | 2016 |
| Irish writings from the age of Swift. Vol. 3 : letters to and from persons of quality | | Monograph or Collective Volume | Cadenus Press | 1974 |
| Irish Yeoman veterans in Leeds county, Ontario | Heueston, John | Article in Journal | | 1998 |
| Irish-Polish correspondence in 1850 and 1855 | Copson-Nipcko, Maria | Article in Journal | | 1974 |
| Irishless. Samuel Beckett e la cultura Europea | Gennaro, Tommaso | Article in Journal | | 2018 |
| Isaac Butt letters | Butt, Isaac | Article in Journal | | 2004 |
| It all began with a letter from America | Murphy, Margaret | Article in Journal | | 2002 |
| It's a long way to Gallipoli | Hajba, Anna-Maria | Article in Journal | | 2015 |
| J J Walsh on a woman's place | Ní Chonaill, Áine | Article in Journal | | 2023 |
| J. K. L.'s letter on the union of churches | McNamee, Brian | Article in Journal | | 1969 |
| J. Sheridan Le Fanu : letters to William Blackwood and John Forster | McCormack, W. J. | Article in Journal | | 1973 |
| Jack o'the castle : a letter from John Dunne to J.G.A. Prim | Anonymous | Article in Journal | | 1976 |
| James Stephens and Paris : an insight gleaned from letters to Thomas Bodkin | Bramsbäck, Birgit | Article in Book | | 1991 |
| James Stephens: a life in letters | O'Mahony, Felicity | Article in Book | | 2013 |
| John Butler Yeats : letters to his son W.B. Yeats and others, 1869-1922 | Yeats, John Butler | Monograph or Collective Volume | Faber | 1999 |
| John Devoy's correspondence with Mrs. Florence D. White (Annie Kickham Cleary) concerning his biography of C.J. Kickham in 1927 | Nolan, William | Article in Journal | | 2006 |
| John Luke (1906-1975) | Hewitt, John | Monograph or Collective Volume | [s.n.] | 1978 |
| John O'Donovan and 'The night of the big wind' | Mehigan, P. D. | Article in Journal | | 1945 |
| John O'Donovan's letters from County Fermanagh (1834) : letters containing information relative to the antiquities and families and places collected during the ordnance survey in 1834 | O'Donovan, John, 1806-1861 | Monograph or Collective Volume | St Davog's Press | 1993 |
| John O'Donovan's letters from county Londonderry (1834) : letters containing information relative to the antiquities of the county Londonderry collected during the progress of the Ordnance Survey | O'Donovan, John, 1806-1861 | Monograph or Collective Volume | Ballinascreen Historical Society | 1992 |
| John Redmond : selected letters and memoranda, 1880-1918 | Redmond, John | Monograph or Collective Volume | Merrion Press | 2018 |
| John Waring Maxwell and the 1798 Rebellion | Brown, Beverly | Article in Journal | | 2010 |
| John Wesley Meets Laetitia Pilkington | English, John C. | Article in Journal | | 2004 |
| Journals and letters | Colum, PadraicDodds, E. R.MacKenna, Stephen, 1872-1934 | Monograph or Collective Volume | Constable | 1936 |
| Journals and letters : Vol.3, 1910-15, Vol. 4,1916-30 | Esher, Oliver, ViscountEsher, Reginald Baliol Brett (2nd viscount) | Monograph or Collective Volume | Ivor Nicholson | 1938 |
| Journals of the house of commons of the kingdom of Ireland, Vols. 2-20 | Anonymous | Monograph or Collective Volume | [s.n.] | 1800 |
| Katherine and Charles Stewart Parnell | Coffey, Dairine | Article in Journal | | 2005 |
| Keeping the lid on an Irish Revolution : the Gosselin-Balfour correspondence | McGee, Owen | Article in Journal | | 2007 |
| Keltologe zwischen Kaiserreich und British Empire: Kuno Meyers Briefe an Korrespondenten in Deutschland und Österreich, 1874-1919 | Meyer, Kuno | Monograph or Collective Volume | Ergon | 2016 |
| Kilkenny flood of 1763 | Colles, William | Article in Journal | | 1996 |
| La correspondence d'Élie Bouhéreau (1643-1719) : les années folâtres | Whelan, Ruth | Article in Journal | | 2010 |
| La cuestión irlandesa en la correspondencia del conde de Gondomar | Moreno Gallego, Valentín | Article in Book | | 2002 |
| Lady golfers | Rigney, Peter | Article in Journal | | 2007 |
| Lady Gregory's early Irish writings 1882-1893 | Gregory, Augusta (Lady Gregory) | Monograph or Collective Volume | Colin Smythe | 2018 |
| Lady Sligo and her letters : the mounting of an inaugural exhibition | O'Hare, Sandy LetourneauYoung, Robert A., Jr | Article in Book | | 2016 |
| Lamenting the death of Dr. Edmund Byrne, Archbishop of Dublin, in 1723 : exploring the connection between letters and poems | Mac Mathúna, Liam | Article in Journal | | 2013 |
| Language and culture on the margins : the community, the individual and the Irish Augustinians in 1640 | Ó Ciosáin, Éamon ; Ó Macháin, Pádraig | Article in Book | Cork University Press | 2024 |
| Last letter of a condemned man | Childers, Erskine | Article in Book | | 2016 |
| Last words : letters and statements of the leaders executed after the rising at Easter 1916 | Mac Lochlain, Piaras Finbarr | Monograph or Collective Volume | Kilmainham Jail Restoration Society | 1971 |
| Latin scholars, wattle stick fightetrs, lice and stormy weather: some of the experiences of an English government official, James Weale, on his first visit to Sliabh Luachra in April 1828 | O'Regan, John | Article in Journal | | 2023 |
| Letter from a Novice at St Isidore's College, Rome, in the Early Nineteenth Century and its annotations | Cunningham, John M.
| Article in Journal | | 2021 |
| Letter from a war zone | Grogan, Patrick | Article in Journal | | 2011 |
| Letter from abroad, 1880 | Cameron, J. | Article in Journal | | 1998 |
| Letter from America | Batchelor, John | Article in Journal | | 2012 |
| Letter from America - 1886 | Ryan, James | Article in Journal | | 1996 |
| Letter from America 1851 | Murphy, Jim | Article in Journal | | 1998 |
| Letter from America, 1859 | Begley, Anthony | Article in Journal | | 1994 |
| Letter from Bytown | | Article in Journal | | 2001 |
| Letter from David Ker to John Steele | Thornton, Mary Lindsay | Article in Journal | | 1963 |
| Letter from Edward Fitton, President of Connacht, to the Lord Deputy, touching on the disorder in Thomond, 1570 | Fitton, Edward | Article in Book | | 1998 |
| Letter from Francis Hutchinson, Bishop of Down and Connor, 1732 | Rankin, Fred | Article in Journal | | 1989 |
| Letter from Hannah Dawson to her niece Heather, Corcrain House, new years day 1933 | Dawson, Hannah, fl. 1933 | Article in Journal | | 1995 |
| Letter from John Sloane relating to the treatment of memorials, 'Irish Builder', 15th October 1878 | Sloane, John, fl. 1878 | Article in Book | | 2000 |
| Letter from Mr Theophilus Harrison to the Rev. John Strype | Harrison, Theophilus | Article in Journal | | 1990 |
| Letter from one who sailed with the Spanish Armada and tells the story of the enterprise of England | De Cuéllar, Francisco | Article in Book | | 1990 |
| Letter from Parishioners to Rev'd John Darby | Jennings, Robert | Article in Journal | | 2004 |
| Letter from Samuel Pelan to his son Thomas Rutherford Pelan | Pelan, Samuel | Article in Journal | | 1984 |
| Letter from the Boer War, 1901 | Jeffery, JohnLucey, John | Article in Journal | | 2019 |
| Letter from the northern front | Swords, Liam | Article in Journal | | 1994 |
| Letter from William George Black relating to the treatment of memorials, 'Irish Builder', 1st October 1878 | Black, William George, fl. 1878 | Article in Book | | 2000 |
| Letter of Connor O'Brien to Charles V, 1534 | O'Brien, Connor | Article in Book | | 1998 |
| Letter of credence by Donatus Magrahe, prior of Lough Derg, for Nylanus O Ledan, priest and pilgrim | | Article in Journal | | 1959 |
| Letter of John Doyle | Doyle, John | Article in Journal | | 1913 |
| Letter of Pope Innocent VIII, 4 December 1488 | Anonymous | Article in Book | | 1991 |
| Letter to an emigrant from an old inn at Lauragh, 1768 | Lyne, Gerard J. | Article in Journal | | 1988 |
| Letter to James S. Kingston Esq. North Main St Bandon, Co. Cork, Ireland from F.G. Adderley, Toronto Ont. | Adderley, F.G. | Article in Journal | | 2024 |
| Letter to Murray of Broughton | Addi, Thomas | Article in Journal | | 1979 |
| Letter to Patrick Joseph MacGreevy of Saul | Henry, Henry | Article in Journal | | 1989 |
| Letter to the editor | Fennessy, Ignatius | Article in Journal | | 2002 |
| Letter-book of Sir Arthur Chichester, 1612-1614 | | Article in Journal | | 1938 |
| Letter-book of the earl of Clanricarde : 1643-47 | | Monograph or Collective Volume | | 1983 |
| Letter-book of the earl of Clanricarde, 1643-47 | | Monograph or Collective Volume | | 1983 |
| Letterbook of Greg and Cunningham, 1756-57 : merchants of New York and Belfast | | Monograph or Collective Volume | Oxford University Press for the British Academy | 2001 |
| Letterbook of the Earl of Clanricarde, 1643-47 | | Monograph or Collective Volume | Stationery Office for the Irish Manuscripts Commission | 1983 |
| Letters across the Atlantic, 1 : the Nowlan letters | | Article in Journal | | 2000 |
| Letters across the Atlantic, 2 : from Tomona to Pomona | | Article in Journal | | 2000 |
| Letters and papers of Archbishop Ignazio Persico, Papal Commissary to Ireland 1887-8 : Part 3 | O'Callaghan, Edward P. | Article in Journal | | 1996 |
| Letters and papers relating to the Irish rebellion, 1642-6 | | Monograph or Collective Volume | IMCC | 1936 |
| Letters back to Ballymena & district : part 1 : insights into the emigrant experience 1804-1902 | | Monograph or Collective Volume | Cambridge House Boys' Grammar School | 1991 |
| Letters between friends : Lord Charlemont's library and other matters | Meredith, Jane | Article in Journal | | 2001 |
| Letters between Westmeath and the Falkland Islands | Walsh, Edward | Article in Journal | | 2015 |
| Letters concerning Robert Barton | Cofey, Saive | Article in Journal | | 2003 |
| Letters from a friend | Martin, Bertie | Article in Journal | | 2004 |
| Letters from a Leitrim Lady | Lockhart, Aisling | Article in Journal | | 2018 |
| Letters from a Victorian princess to Blanche Herbert of Muckross House | O'Hare, Patricia | Article in Journal | | 2012 |
| Letters from abroad : the grand tour correspondence of Richard Pococke and Jeremiah Milles, vol. 1 : letters from the continent (1733-34) | Pococke, Richard, 1704-1765 | Monograph or Collective Volume | Pococke Press | 2011 |
| Letters from abroad : the grand tour correspondence of Richard Pococke and Jeremiah Milles, vol. 2 : letters from the continent (1736-37) | Pococke, Richard, 1704-1765 | Monograph or Collective Volume | Pococke Press | 2012 |
| Letters from America | | Article in Journal | | 1948 |
| Letters from America by a Westmeath emigrant in the 1840s | Fagan, Patrick, 1922-2011 | Article in Journal | | 2005 |
| Letters from an Armenian in Ireland to his friends in Trebisonde | Anonymous | Monograph or Collective Volume | [s.n.] | 1756 |
| Letters from an Irish painter in New York | | Article in Journal | | 1941 |
| Letters from an Ulster land agent, 1774-85 | Crawford, W. H. (William Henry)Moore, John, 1726- | Monograph or Collective Volume | Record Office of Northern Ireland | 1976 |
| Letters from Clonburrin, 1880-1930 | McCarthy, Carmel | Article in Journal | | 2012 |
| Letters from Connaught to a Wild Goose | De Breffny, Brian | Article in Journal | | 1978 |
| Letters from England 1813-1844 | Colvin, ChristinaEdgeworth, Maria, 1768-1849 | Monograph or Collective Volume | Oxford University Press | 1971 |
| Letters from Erin : convict lives in Ireland and Australia | | Monograph or Collective Volume | [s.n.] | 1991 |
| Letters from Francis Drew to John O'Donovan 1861 | Herity, Michael | Article in Journal | | 2006 |
| Letters from Francis Edward to Lucy Lascelles | McCormick, Finbar | Article in Journal | | 2001 |
| Letters from Galway 1772-1805 | | Article in Journal | | 1994 |
| Letters from Georgian Ireland : the correspondence of Mary Delany, 1731-1768 | | Monograph or Collective Volume | | 1991 |
| Letters from Georgian Ireland : the correspondence of Mary Delany, 1731-68 | Connolly, SybilDay, AngéliqueDelany, Mary | Monograph or Collective Volume | Friar's Bush | 1991 |
| Letters from Harold's Cross, 1850 | Burton, Nathaniel J. | Monograph or Collective Volume | Carraig Books | 1979 |
| Letters from home | Punch, Terence M. | Article in Journal | | 1975 |
| Letters from India at the time of the 1st Sikh War | Jocelyn, Robert, 10th Earl of Roden, 1938- | Article in Journal | | 2023 |
| Letters from Ireland | Hooper, GlennMartineau, Harriet, 1802-1876 | Monograph or Collective Volume | Irish Academic Press | 2001 |
| Letters from Ireland during the famine of 1847 | Snell, K. D. M.Somerville, Alexander | Monograph or Collective Volume | Irish Academic Press | 1994 |
| Letters from Ireland during the famine of 1847 | Somerville, Alexander | Article in Journal | | 2000 |
| Letters from Ireland, 1228-1229 | | Monograph or Collective Volume | | 1982 |
| Letters from Irish Australia, 1825-1929 | O'Farrell, Patrick JamesTrainor, Brian | Monograph or Collective Volume | | 1984 |
| Letters from Irish Protestants | Irish Press Agency | Monograph or Collective Volume | Irish Press | 1912 |
| Letters from James Fintan Lalor in Limerick | | Article in Journal | | 1952 |
| Letters from Maynooth : calendar of letters of Rev. Eugene Conwell, 1798-1805 | | Monograph or Collective Volume | Dundalgan Press | 1942 |
| Letters from Mountjoy 1921 | | Article in Journal | | 2018 |
| Letters from Niemba: Irish troops in the Congo, 1960 | Pierce, Siobhán | Article in Journal | | 2010 |
| Letters from Robert Eugene O'Neill | O'Neill, Robert | Article in Journal | | 1964 |
| Letters from Sir Robert Cecil to Sir George Carew | | Monograph or Collective Volume | Printed for the Camden Society | 1864 |
| Letters from Sydney of a '98 deportee | Giblin, Cathaldus | Article in Journal | | 1950 |
| Letters from the front, 1915-16 | Moloney, Tadhg | Article in Journal | | 2017 |
| Letters from the Great Blasket | Ní Shúilleabháin, Eibhlín | Monograph or Collective Volume | Mercier Press | 1978 |
| Letters from the Irish College in Salamanca during the Peninsular Wars (1808-14) | | Article in Journal | | 2011 |
| Letters from the Irish highlands of Connemara by the Blake family of Renvyle House 1823/1824 | Blake, familyWhelan, Kevin | Monograph or Collective Volume | Gibbons Publications | 1995 |
| Letters from the underground : the Fenian correspondence of James Gibbons | Clark, Dennis | Article in Journal | | 1970 |
| Letters from the western front | Hood, Susan | Article in Journal | | 2009 |
| Letters home | Jensen, Mary | Article in Journal | | 1998 |
| Letters of a penal priest | | Article in Journal | | 1942 |
| Letters of an Irish postman | Coughlan, A. J.O'Reilly, F. D. | Article in Journal | | 1993 |
| Letters of Ashford Relief Committee | De Groot, E. | Article in Journal | | 1993 |
| Letters of Charles Bonaventure Maguire O. F. M. (1768-1833) | Faulkner, Anselm | Article in Journal | | 1981 |
| Letters of Charles Lever to his wife and daughter | Rolfe, F. P. | Article in Journal | | 1936 |
| Letters of Charles O'Conor of Belanagare : a Catholic voice in eighteenth-century Ireland | O'Conor, CharlesWard, Catherine CooganWrynn, John F | Monograph or Collective Volume | Catholic University of America Press | 1988 |
| Letters of General Lake, 1798 | McPeake, B. Y. | Article in Journal | | 1953 |
| Letters of Harriet Butler | Butler, Harriet | Article in Journal | | 1978 |
| Letters of Henry and John Sheares | De Valera, Terry, 1922-2007 | Article in Journal | | 1990 |
| Letters of Irish interest | | Article in Journal | | 1952 |
| Letters of Irish interest | | Article in Journal | | 1948 |
| Letters of James Hack Tuke and the Bodyke evictions | Moran, Gerard | Article in Journal | | 2019 |
| Letters of Jean de la Fouleresse to the King of Denmark | Barbé, L.Payen de la Fouleresse, Jean | Article in Journal | | 1990 |
| Letters of John Scully to James Duff Coghlan, 1923-27 | MacDermot, B. C. | Article in Journal | | 1983 |
| Letters of Kuno Mayer to Douglas Hyde, 1896-1919 | Ó Cróinín, Dáibhí | Article in Journal | | 2016 |
| Letters of Lord Longford and others on Irish affairs, 1687-1702 : Ellis Papers, BL MS | | Article in Journal | | 1985 |
| Letters of Maria Edgeworth and Anna Letitia Barbauld | Barbauld, Anna Laetitia, 1743-1825Edgeworth, Maria, 1768-1849Sandford, LetticeScott, Walter Sidney | Monograph or Collective Volume | Golden Cockerel Press | 1954 |
| Letters of Marmaduke Coghill, 1722-1738 | | Monograph or Collective Volume | Irish Manuscripts Commission | 2005 |
| Letters of Mr D. Campbell to Sir Arthur Rawdon | Campbell, D. | Article in Journal | | 1990 |
| Letters of my life | O'Rourke, Mary | Monograph or Collective Volume | Gill | 2016 |
| Letters of William Makepeace Thackeray, Vol. 1 | Ray, Gordon N.Thackeray, William Makepeace, 1811-1863 | Monograph or Collective Volume | Oxford University Press | 1945 |
| Letters on Armagh parish two centuries ago | Ó Fiaich, Tomás | Article in Journal | | 1987 |
| Letters on Armagh parish two centuries ago | Ó Fiaich, Tomás | Article in Book | | 2013 |
| Letters on Irish emigration | Hale, Edward Everett | Monograph or Collective Volume | Books for Libraries Press | 1972 |
| Letters on poetry from W. B. Yeats to Dorothy Wellesley | Yeats, W. B. (William Butler), 1865-1939 | Monograph or Collective Volume | Oxford University Press | 1940 |
| Letters on the state of Ireland addressed by J.K.L. to a friend in England | Doyle, James Warren | Monograph or Collective Volume | Thoemmes | 2001 |
| Letters to 'The Kerryman' (Sept. '36 - Dec. '38) | O'Connell, Donal B. | Monograph or Collective Volume | Kerryman | 1939 |
| Letters to America from a dying sister | O'Malley, Patricia Trainor | Article in Journal | | 1998 |
| Letters to Angela Clifford | MacSwiney, Muriel, b. 1892 | Monograph or Collective Volume | Athol | 1996? |
| Letters to Benjamin Franklin from Irish officers offering to serve the United States | Ferguson, Kenneth | Article in Journal | | 2021 |
| Letters to Canada | Byrne, Declan | Article in Journal | | 2003 |
| Letters to Colorado | Deloughry, Finn | Article in Journal | | 2001 |
| Letters to his family (1874-1927) | McMahon, Patrick | Monograph or Collective Volume | Polding Press | 1974 |
| Letters to John Crone of Doneraile, Co. Cork, 1763-1781 | De Breffny, Brian | Article in Journal | | 1982 |
| Letters to Parsonstown, 1898-1901 | Raughter, Rosemary | Article in Journal | | 2018 |
| Letters to Pope Innocent IV relating to Ireland | | Article in Journal | | 1959 |
| Letters to Stillorgan from the Western Front | MacMahon, Bryan, 1949- | Article in Journal | | 2007 |
| Letters to Stillorgan from the Western Front | MacMahon, Bryan, 1949- | Article in Journal | | 2007 |
| Letters to Stillorgan from the Western Front | MacMahon, Bryan, 1949- | Article in Journal | | 2008 |
| Letters to the new island | Yeats, W. B. (William Butler), 1865-1939 | Monograph or Collective Volume | Macmillan | 1989 |
| Letters to W. B. Yeats and Ezra Pound from Iseult Gonne : a girl that knew all Dante once | Bridgwater, ChristinaGonne, Iseult, 1894-Jeffares, A. NormanWhite, Anna MacBride | Monograph or Collective Volume | Palgrave Macmillan | 2004 |
| Letters written by Arthur Capel, earl of Essex, lord lieutenant of Ireland, 1675 | Anonymous | Monograph or Collective Volume | printed for J. Dodsley; Wilson and Nicol; T. Cadell; Robinson and Roberts | 1770 |
| Letters written by his excellency, Hugh Boulter, D.D., lord primate of all Ireland | Anonymous | Monograph or Collective Volume | [s.n.] | 1770 |
| Letters written by his excellency, Hugh Boulter, D.D., lord primate of all Ireland, etc. 2 vols. | Boulter, Hugh | Monograph or Collective Volume | | 1770 |
| Letters written from Liverpool, Chester, Cork, the lakes of Killarney, Dublin, Tunbridge Wells, and Bath. 2 vols. | Derrick, Samuel | Monograph or Collective Volume | | 1767 |
| Letters, lives, and liberty at An Post museum | Ferguson, Stephen | Article in Journal | | 2012 |
| Letters, speeches and tracts on Irish affairs | Arnold, MatthewBurke, Edmund, 1729-1797O'Brien, Conor Cruise, 1917-2008 | Monograph or Collective Volume | Cresset P. | 1988 |
| Lettres à Henri d'Arbois de Jubainville | Jullian, CamilleToussaint, Maurice | Monograph or Collective Volume | Berger-Levrault | 1951 |
| Lettres persanes | Montesquieu, Charles Louis de Secondat, Baron de la Brède et de | Monograph or Collective Volume | [s.n.] | 1721 |
| Liaisons épistolaires illégitimes entre l'abbé Casgrain et l'Irlandaise Kate E. Godley | Brunet, Manon | Article in Book | | 2007 |
| Liam Mellows, Soldier of the Irish Republic ~ selected writings, 1914–1922 | Mellows, Liam (William Joseph), 1892-1922 | Monograph or Collective Volume | Irish Academic Press | 2019 |
| Liber epistolarum sancti Patricii episcopi : the book of letters of saint Patrick the bishop | | Monograph or Collective Volume | Four Courts | 1994 |
| Liber Lovaniensis : a collection of Irish Franciscan documents, 1629-1717 | | Monograph or Collective Volume | Clonmore & Reynolds | 1956 |
| Libri epistolarum sancti Patricii episcopi : introduction, text and commentary | | Monograph or Collective Volume | Royal Irish Academy | 1994 |
| Lieutenant-Colonel R. G. B. Jeffreys, 2nd Battalion Royal Dublin Fusiliers : collected letters 1916-1918 | Dodd, ConorDodd, LiamJeffreys, R. G. B. | Monograph or Collective Volume | Old Tough Publications | 2007 |
| Life and letters of Sarah Lennox, 1745-1826 | | Monograph or Collective Volume | [s.n.] | 1901 |
| Life in Tudor Limerick: William Good's 'Annual Letter' of 1566 | Houliston, VictorMcCoog, Thomas M. | Article in Journal | | 2016 |
| Lighthouse life | O'Donovan, Rachel | Article in Journal | | 2007 |
| Lismore papers viz. Autobiographical notes, Remembrances, and Diaries of Sir Richard Boyle, First and 'Great' Earl of Cork, never before printed. 10 vols. | | Monograph or Collective Volume | | 1886 |
| Literary links : five letters from Lady Gregory to Francis Hackett and Signe Toksvig | Pihl, Lis | Article in Journal | | 1991 |
| Litir ghrá agus aoir on Gabhailín (1823) | Ó Duibhir, Donnchadha | Article in Journal | | 1994 |
| Litir o Phiaras Mac Gearailt, 1785 | Ó Conchúir, Breandán | Article in Journal | | 1984 |
| Litir ó Sheón Mac Solaidh chun Riostaird Tuibear | Mac Solaidh, Seón | Article in Journal | | 1966 |
| Litir ó thor Londain | De Brún, Pádraig | Article in Journal | | 1987 |
| Litir ón Athair Peadar Ua Laoghaire | Ó Cuív, Brian | Article in Journal | | 1958 |
| Litir ón gCraoibhín chuig Cill Liadáin, 13 Lúnasa 1916 | Ó Muircheartaigh, Peadar | Article in Journal | | 2013 |
| Litreacha oscailte le Pádraic Mac Piarais | Pearse, R. | Monograph or Collective Volume | Conradh na Gaeilge | 1979 |
| Litreacha Phádraig Phiarais Cúndún | Ó Buachalla, Breandán | Article in Book | | 1979 |
| Liverpool - the flood-gate of the Old World : a study in ethnic attitudes | Read, Gordon | Article in Journal | | 1993 |
| Lives of Victorian political figures : part II | | Monograph or Collective Volume | Pickering & Chatto | 2007 |
| Local stories from the First World War | | Article in Journal | | 2004 |
| Locating the Irish Borstal boy in the General Prisons Board correspondence | Reidy, Conor | Article in Journal | | 2013 |
| Lord Altamont's letters to Lord Lucan about the Act of Union, 1800 | Clesham, Brigid | Article in Journal | | 2002 |
| Lord Shannon's letters to his son | Boyle, Richard, 2nd earl of Shannon, 1728-1807Hewitt, Ester | Monograph or Collective Volume | Public Record Office of Northern Ireland | 1983 |
| Lost and found in the archives : Hannah Lynch and Dimitrios Vikélas
Dublin, Athens, Paris : literary crossings and collaborations | Laing, KathrynTheodoropoulou, Iliana | Article in Journal | | 2023 |
| Louisa Moore of Moore Hall: a life in letters | White, Fiona | Article in Book | | 2018 |
| Lovat Fraser's tour of Ireland in 1913 : an event within the Home Rule conflict | Clifford, BrendanFraser, LovatMarsland, Jane | Monograph or Collective Volume | Belfast Historical and Educational Society | 1992 |
| Love from Cork : postcards of the city & county | O'Donovan, Perry | Monograph or Collective Volume | Collins Press | 2013 |
| Love letters from the front | Appleby, Eric,Kelly, Phyllis | Monograph or Collective Volume | Marino | 2000 |
| Love letters to a lady : Letters to Lady Castletown from Justice Oliver Wendell Homes, 1896-1926 | Power, Ita | Article in Journal | | 1993 |
| Love's civil war : Elizabeth Bowen and Charles Ritchie : letters and diaries 1941-1973 | | Monograph or Collective Volume | Simon & Schuster | 2009 |
| Love's tortured headland : a sequel to Lapped furrows | Kavanagh, Peter | Monograph or Collective Volume | The author | 1974 |
| M. J. Whitty | Toibín, Micheál | Article in Journal | | 1964 |
| MacNeill papers : catalogue of an exhibition mainly of manuscript letters from the collection of the late Eoin MacNeill | Anonymous | Monograph or Collective Volume | University College Dublin | 1959 |
| Mails from Botany Bay. First reports from the new penal colony, as published in the Ennis Chronicle April - May 1789 | Sheedy, Kieran | Article in Journal | | 2007 |
| Máirtín Ó Cadhain agus foirm an ghearrscéil: Litir ó Mháirtín Ó Cadhain chuig Seosamh Ó Duibhginn, Eanáir 1947 | Nic Eoin, MáirínNí Dhonnchadha, Aisling | Article in Journal | | 2015 |
| Major Arthur Rowley Heyland, the hero of Waterloo, 1781-1815 | Cunningham, Jennifer | Article in Journal | | 2015 |
| Major-General Oliver Nugent and the Ulster Division 1915-1918 | Nugent, Oliver Stewart Wood, Sir, d. 1926Perry, Nicholas | Monograph or Collective Volume | Sutton Publishing for the Army Records Society | 2007 |
| Making it national ; or, the art of the tale :
correspondence between William Carleton and his publisher | Turton, Jackie | Article in Journal | | 2005 |
| Mallow Volunteers 1913-1916 | Rutherford, Colman | Article in Journal | | 2016 |
| Manuscript sources for the history of Irish civilisation. First supplement, 1965-75. 3 vols. | | Monograph or Collective Volume | | 1979 |
| Maria Edgeworth’s Letters From Ireland | Edgeworth, Maria, 1768–1849 | Monograph or Collective Volume | The Lilliput Press | 2017 |
| Markievicz : prison letters & rebel writings | Naughton, Lindie | Monograph or Collective Volume | Merrion Press | 2018 |
| Mary Cumming's letters home to Lisburn from America 1811-1815 | | Monograph or Collective Volume | Impact-Amergin | 1982 |
| Mary Cumming's letters to Lisburn from America 1811-1815 | Cullen, MaryIrvine, James | Monograph or Collective Volume | Impact-Amergin | 1982 |
| Matthew de Renzy's letters on Irish affairs, 1613-1620 | Mac Cuarta, Brian | Article in Journal | | 1987 |
| Meath-born priest victim of Australian wartime censorship: the story of Fr James Timmons | Cusack, Danny | Article in Journal | | 2021 |
| Medieval papal letters : a source for local history | O'Loughlin, Thomas | Article in Journal | | 1993 |
| Mehitabel Canning : a redoubtable woman | | Monograph or Collective Volume | Rooster | 2001 |
| Memoirs and correspondence of Viscount Castlereagh | | Monograph or Collective Volume | [s.n.] | 1848 |
| Memoirs and letters of Richard and Elizabeth Shackleton, late of Ballitore, Ireland | | Monograph or Collective Volume | printed for Harvey and Darton | 1822 |
| Memorial of Patrick M'Kye, Gweedore, to the Lord Lieutenant of Ireland | M'Kye, Patrick | Article in Book | | 2013 |
| Merchants and material culture in early nineteenth-century Dublin : a consumer case study | Moran, Anna | Article in Journal | | 2008 |
| Messines to Carrick Hill : writing home from the Great War | Burke, Tom | Monograph or Collective Volume | Mercier Press | 2017 |
| Michael Banim and Patrick Kennedy : some manuscript letters (1865-7) | Gilligan, David | Article in Journal | | 1987 |
| Michael Collins : some original documents in his own hand | Collins, MichaelMurphy, Brian P. | Monograph or Collective Volume | Aubane Historical Society | 2004 |
| Michael Collins letter, 21 August 1922, to acting chairman, Westport harbour commissioners | Anonymous | Article in Journal | | 2001 |
| Michael Davitt : Collected writings, 1886-1906 | King, Carla | Monograph or Collective Volume | Thoemmes | 2001 |
| Michael Davitt and John Davitt Jageurs (1895-1916) | O'Neill, Pamela | Article in Journal | | 2007 |
| Michael Davitt and the 'pen' letter | Moody, T. W. (Theodore William), 1907-1984 | Article in Journal | | 1945 |
| Migration in Belfast history: trajectories, letters, voices | Fitzgerald, Patrick,Lambkin, Brian,Trew, Joanne Devlin | Article in Book | | 2013 |
| Miscellanea. 1. Rinuccini letters in the Archivio di Stato, Roma: a preliminary report | Ó Fearghail, Fearghus | Article in Journal | | 2010 |
| Miscellanea. 3. Placenames in the spoken Irish of Kilkenny | Ó Drisceoil, Proinsias | Article in Journal | | 2022 |
| Miscellaneous writings of Henry the Eighth, king of England, France & Ireland : in which are included Assertion of the Seven Sacraments; love letters to Anne Boleyn; songs; letter to the Emperor; two proclamations; will | | Monograph or Collective Volume | | 1924 |
| Mise Pádraig : nua-aistriú ar Fhaoistin Phádraig agus ar an Litir cun Coroticus | Mac Philibin, LiamPatrick, Saint | Monograph or Collective Volume | FÁS | 1961 |
| Monivea 1847. 8 letters | Higgins, Bríd | Article in Journal | | 1995 |
| Monk's lucky nugget: a letter from Australia | Keeling David | Article in Journal | | 2015 |
| Moore to Hobhouse : an unpublished letter | Booth, Bradford A.Moore, Thomas | Article in Journal | | 1940 |
| More letters to Stillorgan from the Great War | MacMahon, Bryan, 1949- | Article in Journal | | 2009 |
| More light on George Sharp | McEvansoneya, Philip | Article in Journal | | 2013 |
| Mother de Sales Devereux | Devereux, Catherine | Article in Journal | | 1964 |
| Mount Erin : a bit of the old sod in Fairfax County | Anonymous | Article in Journal | | 1993 |
| Mr Anthony's bog oak case of gold antiquities | Cahill, Mary | Article in Journal | | 1994 |
| Mr. Gregory's letter-box, | Gregory, Isabella Augusta, Lady, 1852-1932Gregory, WilliamStrallworthy, John | Monograph or Collective Volume | [s.n.] | 1981 |
| Mr. Justice Robert Day (1746-1841) : the diaries and the addresses to Grand Juries, 1793-1829 | Day, Robert, 1836-1914.O'Carroll, Gerald. | Monograph or Collective Volume | Polymath Press | 2004 |
| Mrs Delaney's Wicklow | Anonymous | Article in Journal | | 2001 |
| Mullingar men's Achill experience | McKinstry, Noel | Article in Journal | | 1999 |
| My dear Eva : letters written from Ballykinlar internment camp (1921) | Kearney, Peadar | Monograph or Collective Volume | Bourke | 1976 |
| My dear Max : the letters of Brendan Bracken to Lord Beaverbrook, 1925-58 | Bracken, BrendanCockett, Richard | Monograph or Collective Volume | Historians' Press | 1990 |
| My earliest Irish friends | O'Brien, Mrs William (O'Brien, Sophie Raffalovich, 1860-1960) | Article in Journal | | 1949 |
| Nathaniel Hone and John Quinn : a correspondence | Potterton, Homan | Article in Book | | 1991 |
| New Brunswick shipbuilding and Irish shipping : the commissioning of the Londondery, 1838 | Houston, Cecil J.Smyth, W. J. (William James) | Article in Journal | | 1987 |
| New letters from James Clarence Mangan to John O'Donovan | Shannon-Mangan, Ellen | Article in Journal | | 1988 |
| New light on Ballyfin and the mysterious Dominick Madden, Part 1 | McCarthy, PatriciaMulligan, Kevin | Article in Journal | | 2005 |
| New World Irish : notes on one hundred years of lives and letters in American culture | Morgan, Jack | Monograph or Collective Volume | Palgrave Macmillan | 2011 |
| News from home : letters from Golden and Bruree to Sydney (1851-1959) | Fitzpatrick, David | Article in Journal | | 1990 |
| News of emigrants | Cunningham, J. | Article in Journal | | 2001 |
| Nicholas Downes: Letters from the Argentine | Walsh, Edward | Article in Journal | | 2014 |
| No good days but the present ones? Readers' letters to Woman's Way, 1963-9 | Clear, Caitriona | Article in Book | | 2015 |
| Noble sentiments | McGill, Lochlainn | Article in Journal | | 2016 |
| Nostra vulgari lingua : Scots as a European language 1500-1700 | Horsbroch, Dauvit | Article in Journal | | 1999 |
| Notes from a native son : Swift's intelligencer | La Grand, Virginia | Article in Book | | 2008 |
| Notes on the Ordnance Survey Letters relating to the Barony of Dunkellin | Redington, M. | Article in Journal | | 1915 |
| Notes on the Ordnance Survey Letters relating to the Barony of Dunkellin, Co. Galway ; iv. - Oranmore Parish | Athy, Muriel Lynch | Article in Journal | | 1913 |
| Notes on the Ordnance Survey Letters relating to the Barony of Dunkellin. ii. - Stradbally Parish | Redington, M. | Article in Journal | | 1911 |
| Notes. Madeleine ffrench-Mullen's disapproval of the subjection of Irishmen to barrack life | Kinsella, Anthony | Article in Journal | | 2022 |
| Notes. Stephen Gwynn's proposal to delay the disbandment of the Irish Regiments | Kinsella, Anthony | Article in Journal | | 2022 |
| Observing the Sabbath Day | Carroll, Nuala | Article in Journal | | 2001 |
| Oceans of consolation : personal accounts of Irish migration to Australia | Fitzpatrick, David | Monograph or Collective Volume | Cork UP & Cornell UP | 1994 |
| On the language fanatics | Dillon, JohnDillon, Myles | Article in Book | | 2016 |
| On the trail of early Ulster emigrant letters | Montgomery, Michael | Article in Book | | 2001 |
| Ordnance Survey letters : Down. Letters containing information relative to the antiquities of the County of Down, collected during the progress of the Ordnance Survey in 1834 | NA | Monograph or Collective Volume | Fourmasters Press | 2001 |
| Ordnance survey letters : Kilkenny, 1839 : Letters containing information relative to the antiquities of the county of Kilkenny | NA | Monograph or Collective Volume | Fourmasters Press | 2003 |
| Ordnance Survey letters Dublin : letters containing information relative to the antiquities of the County of Dublin collected during the progress of the Ordnance Survey | | Monograph or Collective Volume | Fourmasters | 2001 |
| Ordnance Survey letters Dublin : letters containing information relative to the antiquities of the County of Dublin collected during the progress of the Ordnance Survey in 1837 | NA | Monograph or Collective Volume | Fourmasters Press | 2001 |
| Ordnance Survey letters for Co. Kildare | O'Donovan, John, 1806-1861 | Article in Journal | | 1942 |
| Ordnance Survey letters for county Kildare | O'Donovan, John, 1806-1861 | Article in Journal | | 1949 |
| Ordnance Survey letters for Kildare | O'Donovan, John, 1806-1861 | Article in Journal | | 1952 |
| Ordnance Survey Letters Limerick : letters relating to the antiquities of the County of Limerickd containing information collected during the progress of the Ordnance Survey in 1840 | | Monograph or Collective Volume | Fourmasters Press | 2014 |
| Ordnance survey letters Londonderry, Fermanagh, Armagh-Monaghan, Louth, Cavan-Leitrim; letters relating to the antiquities of the counties of Londonderry, Fermanagh, Armagh-Monaghan, Louth, Cavan-Leitrim, containing information collected during the progress of the Ordnance Survey in 1834-1836 | | Monograph or Collective Volume | Fourmasters | 2012 |
| Ordnance survey letters Longford and Westmeath; letters relating to the antiquities of the counties of Longford and Westmeath, containing information collected during the progress of the Ordnance Survey in 1837 | | Monograph or Collective Volume | Fourmasters | 2011 |
| Ordnance Survey letters Meath : letters containing information relative to the antiquities of the County of Meath collected during the progress of the Ordnance Survey in 1836 | NA | Monograph or Collective Volume | Fourmasters Press | 2001 |
| Ordnance survey letters Sligo : Letters relating to the antiquities of the county of Sligo containing information collected during the progress of the ordnance survey in 1836 and 1837 | | Monograph or Collective Volume | Fourmasters | 2010 |
| Ordnance Survey Letters Wexford : letters relating to the antiquities of the County of Wexford containing information collected during the progress of the Ordnance Survey 1840 | | Monograph or Collective Volume | Fourmasters Press | 2014 |
| Ordnance survey letters, Meath : Letters containing information relative to the antiquities of the county of Meath collected during the progress of the Ordnance Survey in 1836 | | Monograph or Collective Volume | Fourmasters Press | 2001 |
| Oscar Wilde : a life in letters | | Monograph or Collective Volume | Fourth Estate | 2003 |
| Oscar Wilde : a life in letters, writings and wit | Gardiner, Juliet | Monograph or Collective Volume | Collins & Brown | 1995 |
| Oughterard Barrack and Iar-Connaught | Ferguson, Kenneth | Article in Journal | | 1998 |
| Our beloved country is in danger : some comments on the 1876 election | Lucey, W. L. | Article in Journal | | 1968 |
| Overworked union official | Flatman, Richard | Article in Journal | | 1998 |
| Pádraig Phiarais Cúndún agus Cáit Graídhin | Ó Drisceoil, Proinsias | Article in Journal | | 2019 |
| Papal briefs to Fr. Mansoni, papal nuncio to Ireland | Jones, Frederick | Article in Journal | | 1953 |
| Papers of Anthony Gearnon, O.F.M. | | Article in Journal | | 1964 |
| Papers of Bryan Bolger, 1792-1834 | Bolger, Bryan | Article in Journal | | 1940 |
| Papers of Richard Joachim Hayes, O. F. M., 1810-23, In Franciscan Library, Killiney : part 3, April 1816 | Giblin, Cathaldus | Article in Journal | | 1982 |
| Papers of Richard Joachim Hayes, O. F. M., 1810-24, in Franciscan Library Killiney, Part 5, Jan - May 1817 | Giblin, Cathaldus | Article in Journal | | 1984 |
| Papers of Richard Joachim Hayes, O. F. M., 1810-24, in Franciscan library, Killiney : Part 1, 1810-15; Part 2, Oct-Dec 1815 | Giblin, Cathaldus | Article in Journal | | 1982 |
| Papers of Richard Joachim Hayes, O. F. M., 1810-24, in Franciscan Library, Killiney : part 4, May - Dec 1816 | Giblin, Cathaldus | Article in Journal | | 1983 |
| Part of original documentation re transfer of land as site for new church in Strokestown | | Article in Journal | | 1998 |
| Paul Cullen and his contemporaries : with their letters from 1820 to 1902, 5 | Mac Suibhne, Peadar | Monograph or Collective Volume | Leinster Leader | 1977 |
| Paul Cullen and his contemporaries, Vol. 4 : with their letters from 1820 - 1902 | Mac Suibhne, Peadar | Monograph or Collective Volume | Leinster Leader | 1974 |
| Paul Cullen and his contemporaries, with their letters from 1820-1902, Vol. 2 | Mac Suibhne, Peadar | Monograph or Collective Volume | Leinster Leader | 1963 |
| Paul Cullen and his contemporaries, with their letters from 1820-1902, Vol. 3 | Mac Suibhne, Peadar | Monograph or Collective Volume | Leinster Leader | 1965 |
| Paul Cullen and his contemporaries, with their letters from 1820-1902, Vol.1 | Mac Suibhne, Peadar | Monograph or Collective Volume | Leinster Leader | 1961 |
| Paul Walsh as editor and explicator of Beatha Aodha Ruaidh | Ó Muraíle, Nollaig | Article in Book | | 2002 |
| Pearse writes to his mother | Pearse, Patrick Henry, 1879-1916 | Article in Book | | 2016 |
| Pearse's letter to a Donegal mother | Begley, Anthony | Article in Journal | | 2016 |
| Perchance to Ireland | Hughes, Patrick H. | Monograph or Collective Volume | Minerva Press | 1998 |
| Perplexingly easy : selected correspondence between William Rowan Hamilton and Peter Guthrie Tait | Hamilton, William Rowan, Sir, 1805-1865Wilkins, David | Monograph or Collective Volume | Trinity College Dublin Press | 2005 |
| Personal letters and the organisation of Irish migration to and from New Zealand, 1848-1925 | McCarthy, Angela, 1971- | Article in Journal | | 2003 |
| Peter Paul Galligan | Galligan, Colm J. | Article in Journal | | 2001 |
| Petty-Southwell correspondence, 1676-87 | | Monograph or Collective Volume | Constable | 1928 |
| Pictures of the past : some Forde documents | Blackstock, Allan | Article in Journal | | 1998 |
| Pine coffin reports. Some government correspondence, 1846 | | Article in Journal | | 1995 |
| Politics in the age of revolution : a listing and guide to the microfilm collection. Pt. 1 : the papers of Edmund Burke, 1729-1797, from Sheffield Archives, Sheffield Libraries and Information Services and Northhamptonshire Record Office | Burke, Edmund, 1729-1797 | Monograph or Collective Volume | Adam Matthew Publications | 1994 |
| Pope Gregory the Great and the Irish | Martyn, John R. C. | Article in Journal | | 2005 |
| Pope Innocent III and Ireland : some unnoticed letters | Dunning, P. J. | Article in Journal | | 1945 |
| Pope, Swift, and the poetics of posterity | Rudy, Seth | Article in Journal | | 2011 |
| Pre-famine protestant post-famine catholic : do emigrants' letters reflect the steereotypes? | Parkhill, Trevor | Article in Book | | 2005 |
| Preliminary guide to collections in the archives department | University College Dublin | Monograph or Collective Volume | University College Dublin | 1979 |
| Prelude to the Easter Rising : Sir Roger Casement in imperial Germany | Doerries, Reinhard R. | Monograph or Collective Volume | Cass | 2000 |
| Prison letters of Canon O'Kennedy | O'Kennedy, William, Canon | Article in Journal | | 2013 |
| Prison letters of Countess Markievicz | Markievicz, Constance Georgine, countess Markievicz, 1868-1927 | Monograph or Collective Volume | Virago | 1987 |
| Prisoners : the Civil War letters of Ernie O'Malley | O'Malley, Ernie (Ernest Bernard), 1897-1957 | Monograph or Collective Volume | Poolbeg | 1991 |
| Private correspondence of Chesterfield and Newcastle, 1744-1746; Pt.1 Chesterfield at the Hague; Pt.2 Chesterfield at Dublin | | Monograph or Collective Volume | | 1930 |
| Private George Overend - letters home 1914-15 | McIntyre, George | Article in Journal | | 2015 |
| Public and personal letters : Julia Griffiths and Frederick Douglass' paper | Meer, Sarah | Article in Journal | | 2012 |
| Pückler's progress : the adventures of Prince Pückler-Muskau in England, Wales and Ireland as told in his letters to his former wife, 1826-9 | | Monograph or Collective Volume | | 1987 |
| Quaker education in the past | Lutton, Elizbeth | Article in Journal | | 2002 |
| Queen Victoria's early letters | Raymond, JohnVictoria | Monograph or Collective Volume | Batsford | 1963 |
| Rage or raillery : the Swift manuscripts at the Huntington Library | Mayhew, G. P. | Monograph or Collective Volume | | 1967 |
| Reading between the lines of Mother Aikenhead's letters | Purcell, Mary | Article in Journal | | 1958 |
| Reassessing Townshend's Irish Viceroyalty, 1767-72 : the Caldwell - Shelburne correspondence in the John Rylands Library, Manchester | Powell, Martyn J. | Article in Journal | | 2013 |
| Rebel oppression of British subjects : statement of a deserter | Anonymous | Article in Journal | | 2005 |
| Reflections of an Irish Brigade officer | Hayes, Richard Francis | Article in Journal | | 1949 |
| Registrum epistolarum Stephani de Lexington abbatis de Stanlegia et de Savigniaco | | Article in Journal | | 1952 |
| Religious and social change in early modern Limerick : the testimony of the sexton family papers | Lennon, Colm | Article in Book | | 2009 |
| Repercussions of reform, some papers concerning Brother Jarlath Prendergast, OFM, and St. Anthony's Hostel, Cork | Fennessy, Ignatius | Article in Journal | | 2005 |
| Report on the manuscripts of Mrs Stopford-Sackville | | Monograph or Collective Volume | Historical Manuscripts Commission | 1904 |
| Reports from a lobbyist : two letters from Henry Cooke in London, 1844 | Larkin, John F. | Article in Journal | | 1992 |
| Reports, correspondence and papers relating to emigration from the United Kingdom to the colonies, 1828-38 | Anonymous | Monograph or Collective Volume | Irish University Press | 1969 |
| Return to sender : Revisiting John Hinde's Ireland | Kelly, Paul | Monograph or Collective Volume | Gill Books | 2019 |
| Review Article. Kuno Meyer's boyhood diaries and the letters to family and friends | Breatnach, Pádraig A. | Article in Journal | | 2018 |
| Review article. The Great Nation and the Evil Empire | Deane, Seamus | Article in Journal | | 2009 |
| Review article. Understanding Ireland's 'Good Bishop': Berkeley's correspondence and context(s) | Breuninger, Scott | Article in Journal | | 2013 |
| Review article: Full circle: the Manning-Gladstone correspondence | Wright, Owain | Article in Journal | | 2014 |
| Revolutionary Dublin, 1795-1801 : the letters of Francis Higgins to Dublin Castle | Bartlett, ThomasHiggins, Francis | Monograph or Collective Volume | Four Courts | 2004 |
| Richard Wilson in Rome, 1 : The Wicklow Wilsons; 2 : The Claudean landscapes | Ford, Brinsley | Article in Journal | | 1952 |
| Robert Greacen. Getting on with the 'job of living' | Ferris, Sarah | Article in Journal | | 2007 |
| Robert S. MacAdam's Louth correspondents (1831-1845) | Ó Mórdha, Séamus | Article in Journal | | 1958 |
| Roger Morrice, Sir Henry Hobart, and a new eyewitness account of the battle of the Boyne | McElligott, Jason, 1972- | Article in Journal | | 2004 |
| Roscommon Famine letters | | Article in Journal | | 1996 |
| Salamanca letters : a catalogue of the Irish college of Salamanca correspondence between 1619-1870, in the library of Maynooth college, Ireland | Anonymous | Monograph or Collective Volume | St Patrick's College | 1994 |
| Sale of de Valera letter | Farrell, M. | Article in Journal | | 1994 |
| Samuel Ferguson and John T. Gilbert | Ó Lochlainn, Colm, 1892-1972 | Article in Journal | | 1948 |
| San Francisco 1879 | Murray, Bernadette C. | Article in Journal | | 1999 |
| Scandal nation : law and authorship in Britain, 1750-1832 | Temple, Kathryn | Monograph or Collective Volume | Cornell University Press | 2003 |
| Scéala aduaidh | Uí Ógáin, Ríonach | Article in Book | | 2001 |
| Sea of love, sea of loss : letters to Olive | Quinn, John | Monograph or Collective Volume | Town House | 2003 |
| Sean MacDermott's last letter | Anonymous | Article in Journal | | 1942 |
| Seán Ó Donnabháin agus a lucht cúnta | De Valera, Ruaidhrí | Article in Journal | | 1949 |
| Select documents XLIX. Letters of mourning from Katherine O'Shea Parnell to Delia Tudor Stewart Parnell | | Article in Journal | | 1998 |
| Selected works. Vol 2 | Marx, Karl, 1818-1883 | Monograph or Collective Volume | Lawrence and Wishart | 1943 |
| Selected works. Vol. 1 | Marx, Karl, 1818-1883 | Monograph or Collective Volume | Lawrence and Wishart | 1943 |
| Selections from the correspondence of Arthur Capel, Earl of Essex, 1675-77 | | Monograph or Collective Volume | | 1913 |
| Senior citizens. Letters from George Augustus Moore (1852-1933) to John William Frederick Garvey (1856-1940) | Garvey, Rosemary | Article in Journal | | 1993 |
| Seventeen letters from James I and council of England to the lord deputy and council of Ireland, 1605-7 | | Article in Book | | 1772 |
| Shane O'Neill's last letter | Smith, Ronald M. | Article in Journal | | 1953 |
| Shaw, Lady Gregory and the Abbey : a correspondence and a record | | Monograph or Collective Volume | Colin Smythe | 1993 |
| Sidelights on the Irish church, 1811-38 | Ó Súilleabháin, Pádraig | Article in Journal | | 1966 |
| Sidney state papers, 1565-70 | | Monograph or Collective Volume | The Stationery Office [for the Irish Manuscripts Commission] | 1962 |
| Siege of Lucknow letter | O'Malley-Dunlop, Anna | Article in Journal | | 2004 |
| Sir Paul Rycaut's memoranda and letters from Ireland, 1686-7 | Melvin, PatrickRycaut, Paul, Sir | Article in Journal | | 1972 |
| Sir Paul Rycaut's memoranda and letters from Ireland, 1686-7 | | Article in Journal | | 1972 |
| Sister Nivedita - a psychological reassessment | O'Doherty, Malachi | Article in Journal | | 2018 |
| Six 18th century letters | McCracken, E. | Article in Journal | | 1973 |
| Six unpublished letters of Charles Stewart Parnell | | Article in Journal | | 1983 |
| Sketches of some of the southern counties of Ireland collected during a tour in the autumn of 1797 in a series of letters by G. Holmes | Holmes, George | Monograph or Collective Volume | Ballinakella | 1987 |
| Sliocht as litir Naomh Pól chun na Rómhánach aistrithe go Gaeilge | Breatnach, Pádraig A. | Article in Book | | 2012 |
| Society of the United Irishmen of Dublin | Anonymous | Monograph or Collective Volume | | 1794 |
| Some correspondence of Father Luke Wadding, O.F.M. | Jennings, Brendan | Article in Journal | | 1959 |
| Some correspondence of James and Margaret Pearse | Fennessy, Ignatius | Article in Journal | | 2004 |
| Some famine letters of Dr Robert Traill, rector of Schull (1830-47) | Hickey, Patrick | Article in Journal | | 1995 |
| Some Fitzgibbon letters from the Sneyd muniments in the John Rylands Library | Anonymous | Article in Journal | | 1952 |
| Some letters from St John Henry Newman arising from his denunciation of Giacinto Achilli | Cunningham, John M. | Article in Journal | | 2020 |
| Some letters from W. B. Yeats to John O'Leary and his sister | Yeats, W. B. (William Butler), 1865-1939 | Monograph or Collective Volume | New York Public Lib. | 1953 |
| Some letters of a Thomond antiquary | Hayes, Richard Francis | Article in Journal | | 1943 |
| Some letters of Dr. John O'Donovan | O'Donovan, John, 1806-1861
| Article in Journal | | 1940 |
| Some letters of John O'Donovan | | Article in Journal | | 1944 |
| Some letters of Patrick Manogue, gold miner and bishop of Nevada and California | | Article in Journal | | 1960 |
| Some letters of the emigrant McAteers of Killoughagh, Cushendall | | Article in Journal | | 1998 |
| Some letters relating to the battle of Bunclody | Anonymous | Article in Journal | | 1998 |
| Some matters touching Dromoland : letters of father and son, 1758-9 | McNamara, Leo | Article in Journal | | 1986 |
| Some ordnance survey letters of Dr. John O'Donovan | | Article in Journal | | 1939 |
| Some passages from the letters of W. B. Yeats to A. E. | Yeats, W. B. (William Butler), 1865-1939 | Article in Journal | | 1939 |
| Some passages in the early letters of AE (George W. Russell) | Russell, George William, 1867-1935 | Article in Journal | | 1940 |
| Some unpublished correspondence of Luke Wadding OFM to Giovanni Pietro Puricelli, archpriest of San Lorenzo Maggiore, Milan and Pietro di Gallara | Hazard, Benjamin | Article in Journal | | 2012 |
| Some Unpublished Letters from John Knox to Christopher Goodman | Dawson, Jane E. A.Glassey, Lionel K. J. | Article in Journal | | 2005 |
| Some unpublished letters of Cardinal Newman | | Article in Journal | | 1954 |
| Some unpublished letters of John Gibson Lockhart to John Wilson Croker | Strout, Alan Lang | Article in Journal | | 1945 |
| Some unusual sources for the history of medicine in the National Archives of Ireland | Ireland, Aideen M. | Article in Journal | | 2008 |
| Southwell-Nottingham correspondence | Southwell, Robert, 1635-1702 | Article in Journal | | 1990 |
| Spanish correspondence | O'Brien, Thomas | Article in Book | | 1994 |
| St Oliver Plunkett, Francis Macdonnell, O.F.M., and the mission to the Hebrides | Giblin, Cathaldus | Article in Journal | | 1974 |
| St Patrick's letters : a study of their theological dimension by Daniel Conneely | | Monograph or Collective Volume | An Sagart | 1992 |
| St. Mary's Cathedral, Limerick : unpublished correspondence of the cathedral restoration in the nineteenth century | Mulvin, Lynda | Article in Journal | | 2001 |
| Stephen of Lexington | | Monograph or Collective Volume | Cistercian Publications | 1982 |
| Stones collected ' On a wild Burren mountain' - the archives of Mount Mellary Abbey | Ó Maidín, Uinseann | Article in Journal | | 2005 |
| Straight from the heart : Irish love letters | | Monograph or Collective Volume | Gill and Macmillan | 2011 |
| Strangers : reflections on a correspondence between Daniel Corkery and John Hewitt | Patrick, Walsh | Monograph or Collective Volume | University of Ulster | 1996 |
| Suppressed names in Swift's letters, 1735 | Thompson, Paul V. | Article in Journal | | 1971 |
| Swift's life in late 1743 : an unpublished letter from Dean Swift | Fróes, Joao | Article in Book | | 2003 |
| T. F. Meagher reminiscences - an unpublished letter (to C. Gavan Duffy) | Ryan, Tom | Article in Journal | | 1976 |
| Tadhg Ó Neachtain agus comhfhreagras cairdis mí Feabhra 1726 | Mac Mathúna, Liam | Article in Journal | | 2011 |
| Tales from the trenches at Tara | O'Sullivan, Muiris | Article in Journal | | 2010 |
| Teague land, or a merry ramble to the wild Irish | Dunton, JohnMacLysaght, Edward | Monograph or Collective Volume | Irish Academic Press | 1982 |
| Ten letters to Edmund Burke from the French translator of the 'Reflections on the revolution in France' | Schmitt, Hans O.Weston, John C. | Article in Journal | | 1952 |
| The 'foul methods' of the first Dáil | Walsh, J. J. | Article in Book | | 2016 |
| The 'lost' letters of John O'Donovan | O'Donovan, John | Article in Book | | 2001 |
| The 'Mayflower' letters, 1757-58: Correspondence from Limerick to the Caribbean in the era of the Seven Years' War | Truxes, Thomas M. | Article in Journal | | 2017 |
| The 'papal letters to the Irish' cited by Bede : how did he get them? | Herren, Michael | Article in Book | | 2015 |
| The 'real' addressee(s) of Bede's letter to Wicthed | Ohashi, Masako | Article in Book | | 2015 |
| The 'strange humours' that drove the Scotch-Irish to America, 1729 | Green, E. R. R. | Article in Journal | | 1955 |
| The 'Tribune' file | British and Irish Communist Organisation | Monograph or Collective Volume | The author | 1979 |
| The 1688 correspondence of Nicholas Taaffe, second earl of Carlingford (?-1690), from the Imperial court in Vienna | Worthington, David | Article in Journal | | 2004 |
| The 1913 lock-out : letters for the archbishop | Morrissey, Thomas J. | Article in Journal | | 1986 |
| The 69th Regiment at Bull Run | | Article in Journal | | 1965 |
| The antiquities of Sligo in 1779 as seen by Lewis Irwin of Tanrego House | Harbison, Peter | Article in Book | | 2002 |
| The appearance, disappearance and re-appearance of Terence Joseph Dunne | O'Shea, Mary Rose | Article in Journal | | 2017 |
| The appointment of blessed Oliver Plunket to Armagh | Ó Fiaich, Tomás | Article in Journal | | 1958 |
| The Armenian visits Dublin | | Article in Journal | | 1945 |
| The Ashbourne papers 1869-1913 | Cooke, A. B.Malcomson, A. P. W. | Monograph or Collective Volume | HMSO | 1974 |
| The authorship of a letter received by Tone in America in 1795 | Woods, C. J. (Christopher John) | Article in Journal | | 1990 |
| The Bagenal letters | Sheehan, Richard | Article in Journal | | 2010 |
| The biggest explosion of the Great War | Boyne, Seán | Article in Journal | | 2017 |
| The Bishop of Ferns v. the Rector of Killegney : a contemporary exchange on the historiography of the 1798 Rebellion | Refaussé, Raymond | Article in Journal | | 1998 |
| The bishopric of Derry and the Irish Society of London, 1602-1705, 1 : 1602-70; 2 : 1670-1705. 2 vols. | Moody, T. W. (Theodore William), 1907-1984Simms, J. G. (John Gerald) | Monograph or Collective Volume | | 1968 |
| The book of letters of Saint Patrick the bishop | Howlett, David R. | Monograph or Collective Volume | Four Courts | 1994 |
| The Bordeaux-Dublin letters, 1757 : correspondence of an Irish community abroad | | Monograph or Collective Volume | Oxford UP for the British Academy | 2013 |
| The Bordeaux-Dublin letters, 1757: The voice of an Irish community abroad | Anonymous | Article in Journal | | 2013 |
| The Boulter Letters | | Monograph or Collective Volume | Four Courts | 2016 |
| The Boyle women and familial life writing | Walsh, Ann-Maria | Monograph or Collective Volume | NA | 2019 |
| The British Library catalogue of George Bernard Shaw papers | Anonymous | Monograph or Collective Volume | British Library | 2005 |
| The Brownes of CastlemacGarrett (continued) | Lord Oranmore and Browne | Article in Journal | | 1907 |
| The Buenos Aires Westmeath 1862 Relief Fund | Walsh, Edward | Article in Journal | | 2021 |
| The Burgess papers of Athlone | English, Norman William | Article in Journal | | 1978 |
| The burning of Graiguenoe Park | Good, Anne | Article in Book | | 2016 |
| The California letter | Fox, John | Article in Journal | | 2003 |
| The capture of the Hoche in 1798 | Kerrigan, P. M. | Article in Journal | | 1977 |
| The Carrigan letters | Shortall, William | Article in Journal | | 1997 |
| The Carrigan letters | Shortall, William | Article in Journal | | 1997 |
| The Castle of Inniskilling in 1593-1594 | Trimble, W. C. | Article in Journal | | 1931 |
| The Catholic Church's Irishmen in Rome: the correspondence of Paul Cullen and Tobias Kirby | Orschel, Vera | Article in Journal | | 2008 |
| The Cheney letters, 1682-85 | Dudley, Rowena | Article in Journal | | 1996 |
| The Chetwood letters | Chetwood, Knightly | Article in Journal | | 1921 |
| The Chetwood letters | Chetwood, Knightly | Article in Journal | | 1928 |
| The church and the Famine | Kerr, Donal A. | Article in Book | | 1996 |
| The Clancys of Dartry and the Spanish connection | Glancy, Maria | Article in Journal | | 1996 |
| The clandestine correspondence of Father Patrick Crelly, 1648-9 | Casway, Jerrold | Article in Journal | | 1978 |
| The clock on the tower | Anonymous | Article in Journal | | 2009 |
| The Cloghjordan correspondence of 1822-23 | | Article in Journal | | 1984 |
| The collected letters of Flann O'Brien | | Monograph or Collective Volume | Dalkey Archive Press | 2018 |
| The collected letters of W. B. Yeats, Vol. 4 : 1905-1907 | Yeats, W. B. (William Butler), 1865-1939 | Monograph or Collective Volume | Oxford University Press | 2005 |
| The collected letters of W. B. Yeats, Vol.1 : 1865-1895 | Yeats, W. B. (William Butler), 1865-1939 | Monograph or Collective Volume | Clarendon Press | 1986 |
| The collected letters of W.B. Yeats. Vol. 2. 1896-1900 | | Monograph or Collective Volume | Clarendon Press | 1997 |
| The collected letters of W.B. Yeats. Vol. 3, 1901-1904 | Yeats, W. B. (William Butler), 1865-1939 | Monograph or Collective Volume | Clarendon Press | 1994 |
| The commission of 1609 : legal aspects | Harris, F. W. | Article in Journal | | 1980 |
| The construction of the floating docks. Correspondence respecting loans for the construction of floating docks and markets at Limerick, during the famine (9 September-8 December, 1846) | Tierney, Mark | Article in Journal | | 1995 |
| The correspondence of Abbot Smith, O.S.B. | Curran, M. J. | Article in Journal | | 1955 |
| The correspondence of Catherine McAuley, 1818-1841 | McAuley, Catherine | Monograph or Collective Volume | Four Courts | 2004 |
| The correspondence of Charles Brodrick (1761-1822), archbishop of Cashel | Jenkins, Deborah | Article in Journal | | 1980 |
| The correspondence of Daniel O'Connell, 4 : 1829-1832 | | Monograph or Collective Volume | The Stationery Office [for the Irish Manuscripts Commission] | 1977 |
| The correspondence of Daniel O'Connell, 5 : (1833-1836); 6 : (1837-1840) | | Monograph or Collective Volume | Blackwater | 1977 |
| The correspondence of Daniel O'Connell. 1, 1792-1814; 2, 1815-23; 3, 1824-28; 4, 1829-1832; 5, 1833-1836; 6, 1837-1840; 7, 1841-1845; 8, 1846-7 | | Monograph or Collective Volume | | 1972 |
| The correspondence of Daniel O'Connell. Vols. 7 (1841-1845) and 8 (1846-1847) | | Monograph or Collective Volume | Irish Manuscripts Commission | 1980 |
| The correspondence of Dr Hynes, O.P. | Walsh, Dermot | Article in Journal | | 1966 |
| The Correspondence of Edmund Burke, 1 : April 1774 to June 1768; 2 : July 1768 to June 1774; 3 : July 1774 to June 1778; 4 : July 1778 to June 1782; 5 : July 1782 to June 1789; 6 : July 1789 to Dec. 1791; 7 : Jan. 1792 to Aug. 1794; 8 : Sept. 1794 to Apr. 1796; 9 : May 1796 to July 1797; 10 : Index volume. 10 vols. | | Monograph or Collective Volume | | 1958 |
| The Correspondence of Edward Hincks volume III (1857-1866) | Hincks, Edward | Monograph or Collective Volume | University College Dublin Press | 2009 |
| The correspondence of Edward Hincks, Vol. 2, 1850-1856 | Cathcart, Kevin J.Hincks, Edward, 1792-1866 | Monograph or Collective Volume | University College Dublin | 2008 |
| The correspondence of Edward Hincks, vol.1 (1818-1849) | Hincks, Edward, 1792-1866 | Monograph or Collective Volume | University College Dublin Press | 2007 |
| The correspondence of Eyre Coote with his brother, Charles Henry Coote, and others on the Irish Acts of Union, 1799-1800 | Coote, EyreFleming, David A. | Article in Journal | | 2007 |
| The correspondence of George III and Lord North from 1768 to 1783. 2 vols. | | Monograph or Collective Volume | | 1867 |
| The correspondence of Henry Cromwell, 1655-1659 : from the British Library Lansdowne manuscripts | Cromwell, Henry, 1628-1674Gaunt, Peter | Monograph or Collective Volume | Cambridge University Press for the Royal Historical Society | 2007 |
| The correspondence of Ignatius Geoghegan and Richard Strange, 1784-1797 | Kinsella, Eoin | Article in Journal | | 2020 |
| The correspondence of Irish emigrants to New Zealand | McCarthy, Angela | Thesis | | 2001 |
| The correspondence of John Tyndall, Volume 1. Correspondence, 1840-3 | | Monograph or Collective Volume | Pickering & Chatto | 2014 |
| The correspondence of John, fourth duke of Bedford | | Monograph or Collective Volume | [s.n.] | 1842 |
| The correspondence of Jonathan Swift | Swift, Jonathan, 1667-1745Williams, Harold | Monograph or Collective Volume | | 1963 |
| The correspondence of Jonathan Swift, vol. 1 : Letters 1690-1714 | | Monograph or Collective Volume | Peter Lang | 1999 |
| The correspondence of Jonathan Swift, vol. 2 : Letters 1714-1726 | | Monograph or Collective Volume | Peter Lang | 2001 |
| The correspondence of Mother Jones | | Monograph or Collective Volume | # | 1985 |
| The correspondence of Myles Dillon 1922-1925 : Irish-German relations and Celtic studies | | Monograph or Collective Volume | Four Courts | 1999 |
| The correspondence of Myles Dillon, 1922-1925 : Irish-German relations and Celtic studies | Dillon, JohnDillon, MylesFischer, Joachim | Monograph or Collective Volume | Four Courts | 1999 |
| The correspondence of Samuel Thomson (1766-1816) : fostering an Irish writers' circle | | Monograph or Collective Volume | Four Courts | 2012 |
| The correspondence of Samuel Thomson, 1766-1816 | | Monograph or Collective Volume | Four Courts | 2011 |
| The correspondence of Sir D'Arcy Wentworth Thompson | | Article in Journal | | 2000 |
| The correspondence of the Mahamad of the Spanish and Portuguese congregation of London during the 17th and 18th centuries | Barnett, R. D. | Article in Journal | | 1964 |
| The correspondence of William Good SJ and the Jesuit mission in Elizabethan Ireland,1564–c.1570 | DeWitt, Alexander G.McCoog, Thomas M. | Article in Book | | 2022 |
| The correspondents of Thomas Andrews | Sharp, Robert | Article in Journal | | 2002 |
| The courtship of John Rooney and Katherine Cusack, 1887-93: obligations and marriage ideals in Irish-American New England | Burns, Catherine M. | Article in Journal | | 2012 |
| The creation, dispersal and rediscovery of the papers of the 1st Earl Macartney | Hutton, Brian | Article in Journal | | 1989 |
| The daughters of the first earl of Cork : writing family, faith, politics and place | Walsh, Ann-Maria | Monograph or Collective Volume | Four Courts Press | 2020 |
| The de Valera papers - a signpost | Mac Giolla Choille, Breandán | Article in Book | | 1996 |
| The death of Alice Draycott, 1576 | Brooks, E. St. John | Article in Journal | | 1954 |
| The Dickson letters | Carr, James, O. | Article in Journal | | 1910 |
| The Dillon papers | Ó Seanóir, Stuart | Article in Book | | 1986 |
| The Donovans of Dreenlomane, West Cork | O'Malley, Patricia Trainor | Article in Journal | | 1997 |
| The Drennan-McTier letters, 2, 1794-1801 | | Monograph or Collective Volume | Women's History Project in association with the Irish Manuscripts Commission | 1999 |
| The Drennan-McTier letters, 3, 1802-1819 | | Monograph or Collective Volume | Women's History Project in association with the Irish Manuscripts Commission | 1999 |
| The duke of Ormond and Restoration Ireland | Paley, Ruth | Article in Journal | | 2005 |
| The eagle and the harp : the enterprising Byrne Brothers of County Monaghan | Harris, Ruth-Ann M.Smith, Sally K. Sommers | Article in Journal | | 2010 |
| The Earl of Thomond's letter to a London jeweller, 1595 | Ó Dálaigh, Brian | Article in Journal | | 2005 |
| The Earldom of Bandon: Francis Bernard and the Peerage|The Earldom of Bandon Revisited [A correction] | Ní Chonaill, Áine | Article in Journal | | 2016 |
| The earliest Irish personal letter | Forste-Grupp, Sheryl L. | Article in Journal | | 1995 |
| The early eighteenth-century Irish Baptists : two letters | Herlihy, Kevin | Article in Journal | | 1992 |
| The Earth between them : Joseph Beale's letters home to Ireland from Victoria, 1852-53 | | Monograph or Collective Volume | Wentworth Books | 1975 |
| The eighteenth-century estate agent and his correspondance, County Down : a case study | Richey, Rosemary | Article in Book | | 2005 |
| The Eirenics of John Henry Newman | Blehl, Vincent Ferrer | Monograph or Collective Volume | | 1996 |
| The Elmes letters | Milne, King | Article in Journal | | 1990 |
| The Elmes letters. Part 2 | | Article in Journal | | 1992 |
| The exchange of letters between Lally and Coote upon the surrender of Pondichery, 15th January 1761 | | Article in Journal | | 2004 |
| The failure : the Irish Famine in letters to Australia | Fitzpatrick, David | Article in Book | | 1996 |
| The fall and return of John Macmoyer | Ó Fiaich, Tomás | Article in Journal | | 1958 |
| The Fenian invasion of Canada, 1866 | | Article in Journal | | 1924 |
| The genesis of the Uí Ceinnsealaigh Historical Society | Anonymous | Article in Journal | | 1998 |
| The Gladstone Diaries, 1 : 1825-1832; 2 : 1833-1839; 3 : 1840-1847; 4 : 1848-1854; 5 : 1855-1860; 6 : 1861-1868; 7 : January 1869 - June 1871; 8 : July 1871 - December 1874; 9 : January 1875 - December 1880; 10 : January 1881 - June 1883; 11 : July 1883 - December 1886; 12 : 1887-1891; 13 : 1892-1896; 14 : Index. 14 vols. | Foot, Michael Richard Daniell, 1919-Gladstone, William Ewart, 1809-1898Matthew, Henry Colin Gray, 1941-1999 | Monograph or Collective Volume | | 1968 |
| The Gonne-Yeats letters, 1893-1938 : always your friend | | Monograph or Collective Volume | Hutchinson | 1992 |
| The Great Famine. Some correspondence relating to social conditions in the Loughbrickland area 1840-1850 | Sands, John J. | Article in Journal | | 1987 |
| The Hallinan family of Quartertown | Forde, Robert | Article in Journal | | 1991 |
| The Hugh Jackson Lawlor archive in the Representative Church Body Library [with index | Breen, Aidan | Article in Journal | | 2013 |
| The importance of emigrant documents | Punch, Terrence M. | Article in Journal | | 2010 |
| The Inch correspondence : a selection | Condon, Jim | Article in Journal | | 1989 |
| The Inchiquin manuscripts | | Monograph or Collective Volume | Stationery Office [for the Irish Manuscripts Commission] | 1961 |
| The Irish correspondence of Sir Richard Bellings (1626-1716) | Corrigan, Brendan | Article in Journal | | 2017 |
| The Irish parliament house | Murray, Kevin | Article in Journal | | 1941 |
| The Irish remonstrance of 1317 : an international perspective | Phillips, J.R.S. (John Roland Seymour) | Article in Book | | 2009 |
| The Jacobite war. A dispatch from Limerick, 1691 | Swords, Liam | Article in Journal | | 1994 |
| The Jesuit Irish mission : a calendar of correspondence, 1566-1752 | | Monograph or Collective Volume | | 2017 |
| The John Quinn letters : a pandect | Kavanagh, Peter | Monograph or Collective Volume | The author | 1960 |
| The journal and correspondence of William, Lord Auckland | | Monograph or Collective Volume | [s.n.] | 1861 |
| The Journal of Thomas Moore. Volume 1 [1818-1820] | | Monograph or Collective Volume | University of Delaware Press|Associated University Presses | 1983 |
| The Journal of Thomas Moore. Volume 2. 1821-1825 | | Monograph or Collective Volume | University of Delaware Press|Associated University Presses | 1984 |
| The Journal of Thomas Moore. Volume 3. 1826-1830 | | Monograph or Collective Volume | University of Delaware Press|Associated University Presses | 1986 |
| The Journal of Thomas Moore. Volume 4. 1831-1835 | | Monograph or Collective Volume | University of Delaware Press|Associated University Presses | 1987 |
| The Journal of Thomas Moore. Volume 5. 1836-1842 | | Monograph or Collective Volume | University of Delaware Press|Associated University Presses | 1988 |
| The Journal of Thomas Moore. Volume 6. 1843-1847 | | Monograph or Collective Volume | University of Delaware Press|Associated University Presses | 1991 |
| The Joyce-Beach connection | Pinsker, Sanford | Article in Journal | | 1989 |
| The last letter of John Scott Vandeleur of Ralahine | Simons, Kennie | Article in Journal | | 1996 |
| The Latin style of the Irish Litterae Annuae Societatis Jesu | Harris, Jason | Article in Book | | 2022 |
| The Lecky-Lea correspondence in the Henry Charles Lea library of the University of Pennsylvania, Philadelphia, U.S.A. | Auchmuty, J. J. | Article in Journal | | 1958 |
| The letter book of Lewis Sabran, S.J. | Holt, Geoffrey, 1912- | Monograph or Collective Volume | Catholic Record Society | 1971 |
| The letter from America | Murray, Bernadette C. | Article in Journal | | 1994 |
| The letter under the pillow : 150 years, 2 continents, 840 heroic Irish women | Aherne, Clare | Monograph or Collective Volume | Carrowmore Publishing | 2016 |
| The letter-book of General de Zubiaur : a calendar of the 'Irish' letters | Coombes, JamesWare, N. J. | Article in Journal | | 1978 |
| The letterbook of Richard Boyle, 1st earl of Cork, 1629-1634. Chatsworth House, Hardwick MS 78 | NA | Monograph or Collective Volume | Irish Manuscripts Commission | 2025 |
| The letterbook of Richard Hare merchant of Cork, 1771-1772 | | Monograph or Collective Volume | Irish Manuscripts Commission | 2013 |
| The letters | Yeats, W. B. (William Butler), 1865-1939 | Monograph or Collective Volume | Hart-Davis | 1954 |
| The letters and diaries of John Henry Newman : Vol 16 | Dessain, C. S.Newman, John Henry, cardinal, 1801-1890 | Monograph or Collective Volume | Nelson | 1965 |
| The letters and diaries of John Henry Newman, Vol 14 : Papal agression, 1850 - 1851 | Blehl, Vincent FerrerDessain, Charles StephenNewman, John Henry, cardinal, 1801-1890 | Monograph or Collective Volume | Nelson | 1963 |
| The letters and diaries of John Henry Newman, Vol 21 : The Apologia, 1864-1865 | Newman, John Henry, cardinal, 1801-1890 | Monograph or Collective Volume | Nelson | 1971 |
| The letters and diaries of John Henry Newman, Vol. 18 : new beginnings in England, 1857-1858 | Newman, John Henry, cardinal, 1801-1890 | Monograph or Collective Volume | Nelson | 1968 |
| The letters and diaries of John Henry Newman. Vol. 15 | Blehl, Vincent FerrerDessain, Charles StephenNewman, John Henry, cardinal, 1801-1890 | Monograph or Collective Volume | Nelson | 1964 |
| The letters and diaries of John Henry Newman. Vol. 17 | Blehl, Vincent FerrerDessain, Charles StephenNewman, John Henry, cardinal, 1801-1890 | Monograph or Collective Volume | Nelson | 1967 |
| The letters and papers of James Cotter, junior, 1689-1720 | Cotter, JamesHogan, WilliamÓ Buachalla, Liam | Article in Journal | | 1963 |
| The letters of an Irish Brother Edward Sinnott S.J., from Calcutta, Part 2, 1837-43 | Laheen, Kevin | Article in Journal | | 2006 |
| The letters of an Irish brother, Edward Sinnott, S. J. from Calcutta, 1834-37 | Laheen, Kevin | Article in Journal | | 2005 |
| The letters of Archdeacon Edmund Burton, Dean of Killala | Claffey, John A. | Article in Journal | | 2004 |
| The letters of Bernard Shaw to The Times, 1898-1950 | Shaw, George Bernard, 1856-1950
| Monograph or Collective Volume | Irish Academic Press | 2007 |
| The letters of Charles O'Connor of Belanagare; vol. 1 : 1731-1771 | O'Connor, CharlesWard, C. C.Ward, Robert E. | Monograph or Collective Volume | UMI, Monographs for the Irish American Cultural Institute | 1980 |
| The letters of Charles O'Conor of Belanagare. 2 vols. | Ward, C. C.Ward, R. E. | Monograph or Collective Volume | | 1980 |
| The letters of George Wardell and the battle of Isandlwana, 1879. The recent acquisition of the family papers of lesser-known British Army Officer by Maynooth University Library will add greatly to the rich historiography of the Anglo-Zulu war. | Diver, Luke | Article in Journal | | 2016 |
| The letters of John Johnston | Huxley, Davina | Article in Journal | | 1981 |
| The letters of John O'Donovan in County Fermanagh : dogs, turkeycocks and ganders | Cunningham, John B. 1944- | Article in Journal | | 1992 |
| The letters of Katherine Conolly 1707-1747 | | Monograph or Collective Volume | Irish Manuscripts Commission | 2018 |
| The letters of Liam O'Flaherty | Kelly, Angeline AgnesO'Flaherty, Liam | Monograph or Collective Volume | Wolfhound Press | 1996 |
| The letters of Lieutenant Loftus Reade of Castletown, Co. Fermanagh, 1881-1914 | Hamilton, David Ian | Article in Journal | | 2011 |
| The letters of Lieutenant Robert Clifford, 1st Punjab Cavalry | Kirwan, John | Article in Journal | | 2006 |
| The Letters of Lord Burghley, William Cecil, to his Son Sir Robert Cecil, 1593–1598 | Cecil, William, Lord Burghley | Monograph or Collective Volume | Cambridge University Press | 2017 |
| The letters of Lord Chief Baron Edward Willes to the Earl of Warwick, 1757-1762 : an account of Ireland in the mid eighteenth century | Kelly, James, 1959-Willes, Edward, 1704-1768 | Monograph or Collective Volume | Boethius Press | 1990 |
| The letters of Lord Edward FitzGerald from British North America, 1788-1789 | Holmgren, Michele | Article in Journal | | 2021 |
| The letters of Mrs William O'Brien | O'Rahilly-Mahoney, Sean | Article in Journal | | 1984 |
| The Letters of Oliver Goldsmith | Goldsmith, Oliver, 1728-1774 | Monograph or Collective Volume | Cambridge University Press | 2018 |
| The letters of Oliver Plunkett, 1625-81, archbishop of Armagh and primate of all Ireland | Hanly, JohnPlunkett, Oliver, bishop and saint, 1625-1681 | Monograph or Collective Volume | Dolmen Press | 1979 |
| The letters of P. H. Pearse | Pearse, Patrick Henry, 1879-1916Ó Buachalla, Séamus | Monograph or Collective Volume | Smythe | 1980 |
| The letters of Peter le Page Renouf (1822-1897), Vol.3 : Dublin (1854-1864) | Cathcart, Kevin J.Renouf, Peter Le Page | Monograph or Collective Volume | University College Dublin | 2003 |
| The letters of Saint Oliver Plunkett, 1625-1681 : Archbishop of Armagh and Primate of all Ireland | | Monograph or Collective Volume | | 1979 |
| The letters of Saint Oliver Plunkett, 1625-1681, Archbishop of Armagh and Primate of All Ireland | | Monograph or Collective Volume | | 1979 |
| The letters of Samuel Beckett, vol 1, 1929-1940 | | Monograph or Collective Volume | Cambridge University Press | 2009 |
| The letters of Samuel Beckett, vol. 2 : 1941-56 | Beckett, Samuel | Monograph or Collective Volume | Cambridge University Press | 2011 |
| The letters of Sean O'Casey, vol. 4 : 1959-1964 | Krause, DavidO'Casey, Sean | Monograph or Collective Volume | Catholic University of America Press | 1992 |
| The letters of Sir John Hackett, 1526-34 | | Monograph or Collective Volume | | 1971 |
| The letters of Sir Walter Ralegh | | Monograph or Collective Volume | University of Exeter Press | 1999 |
| The letters of St. Oliver Plunkett | | Monograph or Collective Volume | Dolmen Press | 1979 |
| The letters of Sylvester O'Halloran | Lyons, J. B. (John Benignus)O'Halloran, Sylvester | Article in Journal | | 1962 |
| The Letters of the First Duchess of Ormonde | Butler, Elizabeth, Duchess of Ormond and 2nd Baroness Dingwall (née Preston), 1615–1684 | Monograph or Collective Volume | Iter Press | 2022 |
| The letters of Thomas 'Buck' Whaley at Castletown, County Carlow | Monahan, Amy | Article in Journal | | 1994 |
| The letters of Thomas Moore | Moore, Thomas, 1779-1852 | Monograph or Collective Volume | Clarendon Press | 1964 |
| The letters of William South | O'Rourke, A. J. | Article in Journal | | 1996 |
| The life and letters of Florence MacCarthy Reagh, tanist of Carbery, MacCarthy Mor | McCarthy, Daniel | Monograph or Collective Volume | Miros | 1975 |
| The life of Elisabeth, Lady Falkland, 1585-1639 | Fullerton, G. C. | Monograph or Collective Volume | | 1883 |
| The life of Mary Anderson : an intimate response to the turn-of-the-century world of transatlantic migration | Blower, Brooke L. | Article in Journal | | 2004 |
| The linguistic value of Ulster emigrant letters | Montgomery, Michael | Article in Journal | | 1995 |
| The Lismore papers and nineteenth century Bandon, with particular reference to the parish of Kilbrogan, 1800-50 | Hamilton, Pádraig | Article in Journal | | 1987 |
| The Lismore papers revisited | Hamilton, Pádraig | Article in Journal | | 1992 |
| The London letters of Samuel Molyneux, 1712-13 | | Monograph or Collective Volume | London Topographical Society | 2011 |
| The Londonderry papers : catalogue of the documents deposited in the Durham County Record Office by the 9th Marquess of Londonderry | | Monograph or Collective Volume | | 1969 |
| The lost and early writings of James Connolly, 1889-1898 | | Monograph or Collective Volume | Iskra Books | 2024 |
| The love story of Thomas Davis told in the letters of Annie Hutton | | Monograph or Collective Volume | Cuala Press | 1945 |
| The Lynch Blosse papers | | Article in Journal | | 1980 |
| The manuscripts and correspondence of James, first earl of Charlemont | | Monograph or Collective Volume | Historical Manuscripts Commission | 1891 |
| The manuscripts of his grace the duke of Rutland | | Monograph or Collective Volume | Historical Manuscripts Commission | 1888 |
| The manuscripts of the earl of Donoughmore | Anonymous | Article in Book | | 1891 |
| The manuscripts of the marquis of Abergavenny | Anonymous | Article in Book | | 1887 |
| The McHenry letters (1834-46) | | Monograph or Collective Volume | Ballinascreen Historical Society | 1997 |
| The McIlrath letters : sent from Killinchy, New Zealand to Killinchy, County Down, 1860-1915 | | Monograph or Collective Volume | Killyleagh Branch of North of Ireland Family History Society | 2009 |
| The memoirs and diaries of Judith Isobel Chavasse : an account of life in West Cork and Waterford (1867-1935) | Chavasse, Judith Isobel, 1867-1935 | Monograph or Collective Volume | Pococke Press | 2024 |
| The military correspondence of Field Marshal Sir Henry Wilson, 1918-22 | Jeffery, KeithWilson, Henry Hughes, Sir, 1864-1922 | Monograph or Collective Volume | Bodley Head for the Army Records Society | 1985 |
| The mind and heart of Mary Childers as shown in selections from a personal correspondence with Helen Landreth | Landreth, Helen | Monograph or Collective Volume | The author | 1965 |
| The minute book of the Belfast Rosarian Society | Rogers, P. | Article in Journal | | 1937 |
| The Monica Roberts collection of letters from the Western Front, 1914-1918 | MacMahon, Bryan, 1949- | Article in Journal | | 2008 |
| The Moylan correspondence in Bishop's House, Killarney | | Article in Journal | | 1972 |
| The mystery of William Handlon | Cole, Hunter McKelva | Article in Journal | | 2005 |
| The O'Connor papers | Dunleavy, G. W. (Gareth W.)Dunleavy, J. E. (Janet Egleson) | Monograph or Collective Volume | University of Wisconsin Press | 1977 |
| The O'Conor papers : their significance to genealogists | Dunleavy, G. W. (Gareth W.) | Article in Journal | | 1976 |
| The O'Conor papers:a descriptive catalogue and surname register of the materials at Clonalis House | | Monograph or Collective Volume | University of Wisconsin Press | 1977 |
| The O'Hanlon letter | McMahon, K. | Article in Journal | | 1980 |
| The O'Maolconaire family : unpublished letters from Sir Edward Conry, Bart, to H. F. Hore, Est., 1864 | | Article in Journal | | 1941 |
| The old borough of Tuam (continued) | Kelly, Richard J. | Article in Journal | | 1907 |
| The Old Brotherhood of the English secular clergy : catalogue of the archives | Anonymous | Monograph or Collective Volume | Catholic Record Society | 1968 |
| The only art of Jack B. Yeats : letters and esays | | Monograph or Collective Volume | Lilliput | 2009 |
| The Ordnance Survey letters : Wicklow | | Monograph or Collective Volume | Roundwood & District Historical & Folklore Society and Kestrel Books | 2000 |
| The Ordnance Survey Letters of King's County: their place in the historical literature of the county | Byrne, Michael | Article in Journal | | 2013 |
| The origin and dating of Limerick's Irishtown | Hodkinson, Brian | Article in Journal | | 2009 |
| The origins of Trotskyism in Ireland | Crossey, CiaranMonaghan, James | Article in Journal | | 1996 |
| The Ormesby letters | Ormsby, George | Article in Journal | | 1928 |
| The papers of Bryan Bolger, measurer | McParland, Edward | Article in Journal | | 1972 |
| The papers of George Boole : descriptive list | University College Cork, Library | Monograph or Collective Volume | University College Cork, Library | 1992 |
| The pastoral and education letters of Bishop James Doyle of Kildare and Leighlin, 1786-1834 | | Monograph or Collective Volume | Four Courts | 2004 |
| The Pearse papers rediscovered (What's new in manuscripts) | McNamara, Conor | Article in Journal | | 2012 |
| The Peirce family from Offaly | Conheady, Patricia | Article in Journal | | 1992 |
| The Perrot papers. The letter-book of Lord-Deputy Sir John Perrot between 9 July, [1584] and 26 May, 1586 | | Article in Journal | | 1943 |
| The Petty papers : some unpublished writings of Sir William Petty | | Monograph or Collective Volume | Constable | 1927 |
| The picture postcard | Healy, Adrian | Article in Journal | | 2011 |
| The political correspondence of Mr Gladstone and Lord Granville, 1876-1886 | Gladstone, William Ewart, 1809-1898Leveson-Gower, George Granville, Sir, 1858-Ramm, Agatha | Monograph or Collective Volume | Clarendon Press | 1962 |
| The Portarlington papers | Cox, G. S. | Article in Journal | | 1948 |
| The portrait artist as a young man : letters of Bernard Mulrenin, 1825-34 | Mac Lochlainn, Alf, 1926- | Article in Book | | 1993 |
| The Prendergast famine letters | Prendergast, James | Article in Book | | 1997 |
| The private correspondence of Lord Macartney, governor of Madras, 1781-5 | Davies, Cuthbert CollinMacartney, George, Sir | Monograph or Collective Volume | Royal Historical Society | 1950 |
| The private letter books of William Vesey Fitzgerald 1812-1822 | Sheedy, Kieran | Article in Journal | | 1995 |
| The proposed settlement of New Ireland in Kentucky | Monaghan, Frank | Article in Journal | | 1933 |
| The Pynes of Co. Cork revisited | Morris, H. F. | Article in Journal | | 1997 |
| The Ralahine Horse Reaping Machines | Evans, Alun | Article in Journal | | 1994 |
| The Rawdon papers, consisting of letters on various subjects, literary, political, and ecclesiastical, to and from Dr John Bramhall, Primate of Ireland | | Monograph or Collective Volume | | 1819 |
| The rebel in his family : selected papers of William Smith O'Brien | Davis, MarianneDavis, Richard | Monograph or Collective Volume | Cork University Press | 1998 |
| The rebellion in Ireland, 1798 : Letter by the Rev. Adam Averell to the Rev. John Reynolds, Senior, from Jentover Durrow, June 7th, 1798 | Brigden, Thomas E. | Article in Journal | | 1920 |
| The register of letters of the confederation of Kilkenny to 1645 | Doyle, Seán, Rev. | Thesis | | 1956 |
| The Retraction of Peter Walsh, OFM, 1688 | Fennessy, Ignatius | Article in Journal | | 1992 |
| The Reynolds letters : an Irish emigrant family in late Victorian Manchester | | Monograph or Collective Volume | Cork University Press | 1999 |
| The Reynolds letters : sources for understanding the Irish emigrant experience in America and England, 1865-1934 | McBride, Lawrence W. | Article in Book | | 2000 |
| The Salamanca letters : a catalogue of correspondence (1619-1871) from the Archives of the Irish colleges in Spain in the library of St. Patrick's College, Maynooth, Ireland = Las cartas salmantinas : un catalogo de correspondencia (1619-1871) de los colegios irlandeses in Espana en la biblioteca del colegio de San Patricio, Maynooth, Irlanda | | Monograph or Collective Volume | St. Patrick's College | 1995 |
| The Shackleton letters, 1726-1753 | Young, Margaret F. | Article in Journal | | 1921 |
| The St Lawrence family of Drogheda and Cruisetown | Graves, T. A. | Article in Journal | | 1945 |
| The state letters of Henry, earl of Clarendon, lord lieutenant of Ireland, and his lordship's diary for the years 1687, 1689, and 1690 | Clarendon, Henry Hyde, Earl of | Monograph or Collective Volume | Clarendon press | 1765 |
| The Synge letters : Bishop Edward Synge to his daughter Alicia, Roscommon to Dublin, 1746-1752 | | Monograph or Collective Volume | Lilliput in association with the Irish Manuscripts Commission | 1996 |
| The Synge letters : Bishop Edward Synge to his daughter Alicia, Roscommon to Dublin, 1746-1752 | | Monograph or Collective Volume | Lilliput Press/Irish Manuscripts Commission | 1996 |
| The theft of the relic of Holy Cross Abbey | Fennessy, Ignatius | Article in Journal | | 2000 |
| The Tirry documents in the Augustinian General Archives | Hackett, M. B. | Article in Journal | | 1957 |
| The unfortunate Michael Campbell : a study of two Defender documents 1796 | Mac Giolla Choille, Breandán | Article in Journal | | 1998 |
| The unpublished letters of T. Crofton Croker | Croker, Thomas Crofton, 1798-1854Curtis, Edmund, 1881-1943 | Article in Journal | | 1941 |
| The value of emigrants' letters for genealogical research | Parkhill, Trevor | Article in Journal | | 1984 |
| The Veto controversy, including Thomas Moore's letter to the Roman Catholics of Dublin | | Monograph or Collective Volume | Athol | 1985 |
| The Viscount Weymouth Grammar School: Letters from past pupils | McDermot, Larry | Article in Journal | | 2017 |
| The visit of the King and Queen to Kilkenny Castle in 1904: : letter written by Molly, wife of Canon Percy Wills | Wills, Molly | Article in Journal | | 1988 |
| The Warren letters, 1746-63 | Fennessy, Ignatius | Article in Journal | | 2008 |
| The Westminster magistrate and the Irish stroker : Sir Edmund Godfrey and Valentine Greatrakes, some unpublished correspondence [1666-71] | Marshall, Alan | Article in Journal | | 1997 |
| The Weymouth School: Letters from Past Pupils, part II | McDermott, Larry | Article in Journal | | 2019 |
| The whole works of ... James Ussher ... | Elrington, Charles RichardTodd, James Henthorn, 1805-1869Ussher, James, bishop, 1581-1656 | Monograph or Collective Volume | | 1847 |
| The wit of Loma Linda's Irishman | Daly, Lydia | Article in Journal | | 1979 |
| The Woodhouse-Stradbally papers, 1668 to 1904 | Peacock, H. R.R. | Article in Journal | | 1983 |
| The works of James Barry, containing his correspondence | Barry, James | Monograph or Collective Volume | [s.n.] | 1809 |
| The world of Mary O'Connell 1778-1836 | Bishop, Erin I. | Monograph or Collective Volume | Lilliput | 1999 |
| The writings of Theobald Wolfe Tone 1763-98. Vol. 2 : America, France and Bantry Bay | Tone, Theobald Wolfe, 1763-1798 | Monograph or Collective Volume | Oxford University Press | 2001 |
| The writings of Theobald Wolfe Tone, 1763-98. Vol. 3, France, the Rhine, Lough Swilly and the death of Tone, January 1797-November 1798 | Tone, Theobald Wolfe, 1763-1798
| Monograph or Collective Volume | Clarendon Press | 2007 |
| Theatre business : the correspondence of the first Abbey directors | Saddlemyer, Ann | Monograph or Collective Volume | Colin Smythe | 1982 |
| Thomas Cloney letters, 1815-1819, auctioned in America in 2001 | Joyce, John | Article in Journal | | 2006 |
| Thomas Cromie at the Battle of Waterloo | Harding, Barbara | Article in Journal | | 2015 |
| Thomas Dermody, 1775-1802 : another letter | Mabbott, T. O. | Article in Journal | | 1939 |
| Thomas England 1823-1869, a Bandon-born architect in Carlifornia, U.S.A., part 1 | England, M. J. | Article in Journal | | 2003 |
| Three eighteenth century Drogheda letters | Corcoran, Moira | Article in Journal | | 1989 |
| Three eighteenth century letters from Lady Theodosia Crosbie | Knight of Glin, 1937- | Article in Journal | | 1984 |
| Three unpublished letters of Sylvester O'Halloran | O'Halloran, Sylvester, 1728-1807 | Article in Journal | | 2009 |
| Tom Moore and George Bryan, Jenkinstown | Brennan, John | Article in Journal | | 1989 |
| Tomás Ó Fiaich's letters from Louvain : letters, 1950-1952, from Tomás Ó Fiaich, St Anthony's College, Louvain, to his father, Patrick Fee, Anamar | McMahon, KevinÓ Fiaich, Tomás | Monograph or Collective Volume | Cullyhanna Community Enterprises | 1994 |
| Too long a sacrifice : the letters of Maud Gonne and John Quinn | Londraville, JanisLondraville, RichardMacBride, Maud Gonne, 1866-1953Quinn, John | Monograph or Collective Volume | Associated University Presses|Susquehanna University Press | 1999 |
| Transatlantic correspondence sixty years ago. John Ormonde Butler to David Butler & gang | Butler, John Ormonde | Article in Journal | | 2007 |
| Treasure Trove and Dublin Castle:cases and collectors from Cork | Ireland, Aideen M. | Article in Journal | | 2013 |
| Troy to Carroll : letters from Dublin to Baltimore, 1794-1815 | | Article in Journal | | 1998 |
| Two Irish jokes|The Irish names in Suadbar's letter (Appendix) | Howlett, DavidIreland, Colin (Appendix) | Article in Book | | 2015 |
| Two letters : from an Irish emigrant and from Séamus Ó Searcaigh | Ó Muirí, Réamonn | Article in Journal | | 2002 |
| Two letters from Boetius (Augustine) MacEgan, O.F.M., on the death of Archibishop Florence Conry, O.F.M. 1629 | Fennessy, Ignatius | Article in Journal | | 2001 |
| Two letters from Fort Sumter | | Article in Journal | | 1962 |
| Two letters from the Eneas McDonnell MSS | Ainsworth, John F. | Article in Journal | | 1973 |
| Two letters in Irish from Domhnall Mac Suibhne OSA in Nantes (1640) [with index] | O'Scea, CiaranÓ Ciosáin, ÉamonÓ Macháin, Pádraig | Article in Journal | | 2015 |
| Two letters of Benjamin Chandlee | Goodbody, Olive | Article in Journal | | 1975 |
| Two letters of Cardinal Cullen, 1871 and 1873 | Walsh, Katherine | Article in Journal | | 1973 |
| Two letters of John O'Donovan | O'Donovan, John, 1806-1861 | Article in Journal | | 1954 |
| Two letters relating to the appointment of Anthony Traill to the provostship of Trinity College, Dublin | McDowell, R. B. (Robert Brendan), 1913-2011 | Article in Journal | | 1962 |
| Two Ponsonby letters | Ireland, Aideen M. | Article in Journal | | 1993 |
| Two Ulster Businessmen's views of the American civil war | Morton, Grenfell | Article in Journal | | 1975 |
| Two unknown confraternity letters of St Bernard | Meersseman, G. G. | Article in Journal | | 1955 |
| Two unpublished letters of a distinguished Cork antiquary | Dolley, Michael | Article in Journal | | 1963 |
| Two unpublished letters on Anglo-Irish relations | Hopkins, Gerard Manley | Article in Journal | | 1970 |
| Ulster emigrant's letters | Green, E. R. R. | Article in Book | | 1992 |
| Ulster Protestant letter writers in New Zealand | McCarthy, Angela, 1971- | Article in Book | | 2006 |
| Une femme de lettres oubliée : Marie-Caroline Murray, 1741-1831 | Claessens, P. E.Dezuttere, P. | Article in Journal | | 1967 |
| Une lettre de Philippe O'Sullivan Beare à Jean Bolland sur Saint Aidan | Joassart, Bernard | Article in Journal | | 1972 |
| Unholy Force: Toland's Leibnizian ‘Consummation’ of Spinozism | Leask, Ian | Article in Journal | | 2012 |
| Unpublished Burke letters (II), 1765-97 | Lock, F. P. | Article in Journal | | 1999 |
| Unpublished letters by Edward Lhuyd in the National Library of Scotland | Campbell, John Lorne | Article in Journal | | 1976 |
| Unpublished letters from Richard II in Ireland, 1394-5 | Curtis, Edmund, 1881-1943 | Article in Journal | | 1924 |
| Unpublished letters of Edward Murphy and Lord Charlemont | Benedetti, SergioCroke, Fionnuala | Article in Book | | 2001 |
| Unpublished letters of Owen Roe O'Neill | Casway, J. | Article in Journal | | 1981 |
| Unpublished letters of Thomas Francis Meagher to Sir Henry Singer Keating | Meagher, T. F. | Article in Journal | | 1938 |
| Unpublished medieval notitiae and epistolae [1217-36] | | Article in Journal | | 1964 |
| Upholding the commandments and the will of the majority: the Catholic hierarchy, the October 1922 pastoral, and the Irish civil war | Waldron, KieranÓ Corráin, Daithí | Article in Journal | | 2023 |
| Vatican archives Minutae brevium in forma gratiosa relating to Clogher diocese | Haren, M. J. | Article in Journal | | 1985 |
| Veterum epistolarum Hibernicarum sylloge | | Monograph or Collective Volume | | 1632 |
| Vicissitudes of a manuscript collection : the papers of Maurice Lenihan in the Burns Library, Boston College | Mac Lochlainn, Alf, 1926- | Article in Journal | | 2010 |
| Voices from the past : three antiquarian letters | Mitchell, G. F. (George Francis), 1912-1997 | Article in Journal | | 1983 |
| Voices of Ireland, 1918-1926 : the postbag of Richardson Evans | Martin, Gerald Warren | Article in Journal | | 1989 |
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| Walsh's Irish regiment of marine artillery, French army | Murray, T. H. | Article in Journal | | 1907 |
| Wandering women : two centuries of travel out of Ireland | Kelly, Angeline Agnes | Monograph or Collective Volume | Wolfhound | 1995 |
| Was it for this : Reflections on the Easter Rising and what it means to us now, 1916-2016 | | Monograph or Collective Volume | Irish Times | 2016 |
| Wellington and his friends | Wellesley, Arthur, 1st duke of Wellington, 1769-1852Wellesley, Gerald, 7th duke of Wellington | Monograph or Collective Volume | Macmillan | 1965 |
| Wentworth Woodhouse manuscripts : hand list and index | Anonymous | Monograph or Collective Volume | | 1984 |
| West coast connections : the correspondence network of Élie Bouhéreau of La Rochelle | Whelan, Ruth | Article in Book | | 2018 |
| What is it we seek to find in first-person documents? documenting society and cultural practices in Irish immigrant writings | Gerber, David A., 1944- | Article in Journal | | 2004 |
| When the clock struck in 1916 : close-quarter combat in the Easter Rising | Kelly, DarrenMolyneux, Derek | Monograph or Collective Volume | Collins Press | 2015 |
| Whitley Stokes's correspondence with John O'Donovan, 1857-1861 | Herity, Michael | Article in Journal | | 2010 |
| William Maginn : the Cork correspondent | Latané, David E. | Article in Book | | 2020 |
| William O'Brien's Canadian correspondence | Lyne, Daniel C. | Article in Journal | | 1971 |
| William Wallace's civil war letters : the Virginia campaign | Holzhueter, John O. | Article in Journal | | 1973 |
| Willie Yeats and John O'Leary | Crone, J. S. | Article in Journal | | 1940 |
| Winston S. Churchill, 2 : Young statesman, 1901-14 | Churchill, Randolph Frederick Edward Spencer, 1911-1968 | Monograph or Collective Volume | | 1966 |
| Winston S. Churchill. Companion to vol. 1, pt. 1 : 1874-1896; pt. 2 : 1896-1900. 2 pts. | Churchill, Randolph Frederick Edward Spencer, 1911-1968 | Monograph or Collective Volume | | 1967 |
| Winston S. Churchill. Companion to vol. 2, pt. 1 : 1901-1907; pt. 2 : 1907-1911; pt. 3 : 1911-1914. 3 pts. | Churchill, Randolph Frederick Edward Spencer, 1911-1968 | Monograph or Collective Volume | | 1969 |
| Wolfe Tone letter, 1795 | St. Mark, J. J. | Article in Journal | | 1971 |
| Women and epistolary agency in early modern culture, 1450-1690 | | Monograph or Collective Volume | Routledge | 2016 |
| Women, education and literature : the papers of Maria Edgeworth, 1768-1849 | Edgeworth, Maria, 1768-1849 | Monograph or Collective Volume | Adam Matthew | 2001 |
| Woodrow Wilson, life and letters. Vol. 7: | Baker, Ray Stannard | Monograph or Collective Volume | Heinemann | 1939 |
| Writing home. Letters from Benjamin Foster Elliott from the United States to his family in County Monaghan written between 1849 and 1864 | Elliott, Benjamin Foster | Article in Journal | | 2012 |
| Yeats and Patrick McCartan : a Fenian friendship | McCartan, PatrickYeats, W. B. (William Butler), 1865-1939 | Monograph or Collective Volume | Dolmen Press | 1967 |
| You have the right to refuse silence : Oscar Wilde's Prison Letters and Tom Clarke's Glimpses of an Irish Felon's Prison Life | Jarrin, Casey A. | Article in Journal | | 2008 |
| You will dye at midnight: threatening letters in Victorian Ireland | McCracken, Donal P. | Monograph or Collective Volume | Eastwood Books, The Wordwell Group | 2021 |
| Your fondest Annie : letters from Annie O'Donnell to James P. Phelan, 1901-1904 | Murphy, MaureenO'Donnell, Annie | Monograph or Collective Volume | University College Dublin Press | 2005 |
| Yours sincerely | MacNamara, Angela | Monograph or Collective Volume | Veritas | 2003 |
| Yours, Convict 12 | Markievicz, Constance | Article in Book | | 2016 |
| Zum Humanismus St Columbans | Jakobi, Rainer | Article in Journal | | 2006 |
| ‘A taste for building’: domestic space in elite female correspondence | Sonnier, Priscilla | Article in Book | | 2022 |
| ‘Bands of fellowship ’: the role of personal relationships and social networks among Irish migrants in New Zealand, 1861–1911 | McCarthy, Angela | Article in Journal | | 2005 |
| ‘Hope for happier days’: Happiness in the Letters between Siblings in Nineteenth-Century Middle-Class Ulster Families | Devlin, Shannon | Article in Book | | 2021 |
| ‘I have been trying very hard to be powerful “nice” …’ : the correspondence of Sister M. De Sales (Brennan) during the American Civil War | Quinn, E. Moore | Article in Journal | | 2010 |
| ‘This day by letters severall from hands’ News Networks and Oliver Cromwell’s Letters from Drogheda | Poyntz, Nick | Article in Book | | 2021 |
| “This unfortunate book” : Bram Stoker and the Edwardian publishing industry | Hughes, William | Article in Journal | | 2021 |
| “This unfortunate book” : Bram Stoker and the Edwardian publishing industry | Hughes, William | Article in Journal | | 2021 |