| Contemporary sketches of the members of the Irish Parliament in 1782 | | Article in Journal | | 1954 |
| Documents on the affairs of Ireland before the king's council | | Monograph or Collective Volume | The Stationery Office [for the Irish Manuscripts Commission] | 1979 |
| Ecclesiastical process and the parsonage of Stabannon in 1351 : a study of the medieval Irish church in action | Sayles, George Osborne | Article in Journal | | 1952 |
| Irish revenue, 1278-1384 | Richardson, Henry GeraldSayles, George Osborne | Article in Journal | | 1962 |
| King Richard II of England : a fresh look | Sayles, George Osborne | Article in Journal | | 1971 |
| Medieval [Ulster] | Sayles, George Osborne | Article in Book | | 1952 |
| Modus tenendi parliamentum : Irish or English? | Sayles, George Osborne | Article in Book | | 1981 |
| Parliament in medieval Ireland | Richardson, Henry GeraldSayles, George Osborne | Monograph or Collective Volume | Dundalgan Press | 1964 |
| Parliaments and councils of mediaeval Ireland. Vol. 1 | | Monograph or Collective Volume | The Stationery Office [for the Irish Manuscripts Commission] | 1947 |
| Scripta diversa | Sayles, George Osborne | Monograph or Collective Volume | | 1982 |
| The administration of Ireland | Sayles, George Osborne | Article in Journal | | 1980 |
| The administration of Ireland, 1172-1377 | Richardson, Henry Gerald,Sayles, George Osborne | Monograph or Collective Volume | The Stationery Office [for the Irish Manuscripts Commission] | 1963 |
| The battle of Faughart | Sayles, George Osborne | Article in Book | | 1964 |
| The first earl of Desmond as other than "Rebellious": a challenge to G.O.Sayles | Fitzgerald, Michael (M.J.)Sayles, George Osborne | Article in Journal | | 2009 |
| The Irish parliament in the Middle Ages | Richardson, Henry GeraldSayles, George Osborne | Monograph or Collective Volume | University of Pennsylvania Press | 1952 |
| The Irish parliaments of Edward I | Richardson, Henry GeraldSayles, George Osborne | Article in Journal | | 1928 |
| The legal proceedings against the first earl of Desmond | | Article in Journal | | 1966 |
| The rebellious first earl of Desmond | Sayles, George Osborne | Article in Book | | 1961 |
| The vindication of the earl of Kildare from treason, 1496 | | Article in Journal | | 1950 |
| Who was the parson of Stabannon in 1351? | Sayles, George Osborne | Article in Journal | | 1948 |