| 2886 | National Library of Ireland | Ms1396 | c1821 | Typescript copy of a fragmentary census of Kilmore P... | |
| 9059 | National Library of Ireland | Ms13962 | 1916-1921 | Includes typescript statements by Mabel and Milo McG... | William O'Brien Papers |
| 9060 | National Library of Ireland | Ms13969 | 1928 | Nine letters relating to the `Shan Van Vocht', inclu... | William O'Brien Papers |