T. M. Donovan Papers, 1901-1948 24 items Tadhg McKenna Additional Papers, 1921-1930 12 items Taking Liberties Photographic Collection Collection-level description only Talbot Crosbie Papers 139 items Ted O'Sullivan Papers, 1916-1946 15 items Tempest Photographic Collection 49 items Terence MacSwiney Papers, 1902-1917 23 items Theatrum orbis terrarum 91 items Thomas Conolly Papers, 1760-1822 17 items Thomas Goodwin Keohler papers, ca. 1900-1945 21 items Thomas H. Nally papers, 1897-1954 29 items Thomas Johnson Additional Papers, 1913-1980 108 items Thomas Johnson Papers 1519 items Thomas MacDonagh Additional Papers, 1870-1967 442 items Thomas MacDonagh Family Papers, 1848-1966 1202 items Thomas MacDonagh Papers, 1898-1916 1016 items Three autograph letters from Constance Markievicz to Miles Mallon 3 items Three letters to Cumann Gaodhalach na hEaglaise from Roger Casement and Francis Joseph Bigger 4 items Tighe, Hamilton and Howard Papers, 1749-1919 79 items Tighe of Rosanna Papers, 1758-1945 17 items