| 1698 | National Library of Ireland | Ms13483 | 1902-1905 | Letters mainly to T P Gill, including among others l... | T.P. Gill Papers |
| 1699 | National Library of Ireland | Ms13491 | 1924-1931 | Letters, mainly to T P Gill, mostly relating to the ... | T.P. Gill Papers |
| 1700 | National Library of Ireland | Ms13492 | c1890-1930 | Undated letters to T P Gill, principal correspondent... | T.P. Gill Papers |
| 2498 | National Library of Ireland | Ms13400 | c1850 | Documents, mainly letters to Lord and Lady Monteagle... | Monteagle Papers |
| 2867 | National Library of Ireland | Ms134 | 1897-1922 | Letters from Mary Kingsley to Mrs J R Green, 1897-19... | |
| 3737 | National Library of Ireland | Ms13408 | 1856 | Includes two letters of Florence Nightingale to Lady... | Monteagle Papers |
| 3738 | National Library of Ireland | Ms13453 | 1904 | Twenty letters to J F X O'Brien relating to alleged ... | J F X O'Brien Papers |
| 3739 | National Library of Ireland | Ms13458 | c1884-1915 | Letters to persons closely associated with J F X O'B... | J F X O'Brien Papers |
| 3740 | National Library of Ireland | Ms13479 | 1893-1895 | Letters mainly to T P Gill, including some from Blan... | T.P. Gill Papers |
| 9073 | National Library of Ireland | Ms13426 | 1888-1904 | Six letters to J F X O'Brien, 1888-1904, from member... | J F X O'Brien Papers |