| "Divide and rule" : factionalism as royal policy in the lordship of Ireland, c. 1171-1265 | Crooks, Peter | Article in Journal | | 2005 |
| A land of war | Lydon, James F. | Article in Book | | 1987 |
| A medieval 'power couple': Isabel de Clare and William Marshal | Murphy, Pat | Article in Journal | | 2010 |
| An córus feódach i gcriochaibh na mBuitléireach ó'n xii go dtí an xv aois | Byrne, Anna T. (Ní Bhroin, Áine T.) | Thesis | | 1941 |
| Anglo-Norman county Waterford, 1200-1300 | Empey, C. A. (Adrian) | Article in Book | | 1992 |
| Bastard feudalism and the Kildare Rebellion, 1534-35 : the character of rebel support | Ellis, Steven G., 1950- | Article in Book | | 2006 |
| Cert rig Caisil : the right of the king of Cashel | Hull, Vernam | Article in Journal | | 1949 |
| Collectanea de rebus Hibernicis. 6 vols. | Vallancey, Charles | Monograph or Collective Volume | | 1770 |
| Colonialism, feudalism and the mode of production in nineteenth-century Ireland | McDonough, TerrenceSlater, Eamonn | Article in Book | | 2005 |
| Dynastic warfare and historical writing in North Munster, 1276-1350 | Nic Ghiollamhaith, Aoife | Article in Journal | | 1981 |
| English nobility : the gentry, the heralds and the continental context | Sayer, M. J. | Monograph or Collective Volume | | 1979 |
| Feudalism : reflections on a tyrannical construct's fate | Brown, Elizabeth A. R. | Article in Book | | 2022 |
| Government, War and Society in Medieval Ireland: Essays by Edmund Curtis, A.J. Otway-Ruthven and James Lydon | Curtis, Edmund, 1881-1943Lydon, James F.Otway-Ruthven, Annette Jocelyn, 1909-1989 | Monograph or Collective Volume | Four Courts Press | 2008 |
| Investment in early Irish agriculture | Mac Niocaill, Gearóid | Article in Book | | 1982 |
| L'armée en Angleterre depuis la conquête de la Grande-Bretagne par les Anglo-Saxons jusqu'à la fin du règne de Henry III, 1273 | Lot, Ferdinand | Article in Book | | 1946 |
| Late medieval Donegal | Simms, Katharine | Article in Book | | 1995 |
| Select documents. A charter of Hugh II de Lacy, earl of Ulster, to Hugh Hose (2 March 1207) | | Article in Journal | | 2013 |
| Six tracts on 'coign and livery', c.1568-78 | | Article in Journal | | 2014 |
| Strategies of lordship in pre-Norman and post-Norman Leinster | Flanagan, Marie Therese | Article in Journal | | 1998 |
| Taxation and defence in late medieval Ireland : the survival of scutage | Ellis, Steven G., 1950- | Article in Journal | | 1978 |
| Tenure and locality in north Leinster in the early thirteenth century | Smith, Brendan, 1963- | Article in Book | | 1995 |
| The Church in the English lordship, 1216-1307 | Hand, Geoffrey Joseph | Monograph or Collective Volume | Gill | 1968 |
| The Ecclesiastical History of Orderic Vitalis, 5 : Books 9 and 10 | | Monograph or Collective Volume | | 1975 |
| The evolution of the demesne in the lordship of Leinster: the fortunes of war or forward planning? | Empey, Adrian | Article in Book | | 2017 |
| The first Ulster plantation : John de Courcy and the men of Cumbria | Duffy, Seán | Article in Book | | 1995 |
| The interface between the Gaelic clan system of Co. Clare and the emerging centralising English nation-state in the late sixteenth and early seventeenth century | Nugent, Patrick | Article in Journal | | 2007 |
| The Lordship of Ireland in the Middle Ages | Lydon, James F. | Monograph or Collective Volume | Gill & Macmillan | 1972 |
| The status of the native Irish after 1331 | Murphy, Bryan | Article in Journal | | 1967 |
| The town in Ireland | | Monograph or Collective Volume | Appletree Press | 1981 |
| Three Exchequer documents from the reign of Henry III | Lydon, James F. | Article in Journal | | 1966 |