| A man of Roscrea | Gleeson, Dermot F. | Article in Journal | | 1947 |
| Colonel Walter Butler | Butler, Hubert | Article in Journal | | 1977 |
| The enigma as exemplar : Walter Butler (d.1638) and Schiller's Wallenstein (1799) | Krobb, Florian | Article in Book | | 2010 |
| The German heirs and successors of Colonel Walter Butler (died) 1635 | Pogrell, Christoph, Von | Article in Journal | | 1991 |
| The man from Roscrea : famous or infamous? | Ó Riain-Raedel, Dagmar | Article in Book | | 2012 |
| Two men of Roscrea | Gleeson, Dermot F. | Article in Journal | | 1944 |
| Walter Butler | Butler, Hubert | Article in Journal | | 1970 |