Contains manuscript material, brochures, pamphlets, and a substantial newspaper collection created principally by Tullamore brothers and Irish Volunteers Séamus and Alo O’Brennan. The earliest material from 1906 and 1909 are programs for feiseanna held by Tullamore Celtic Literary Society and Conradh na Gaeilge. Also includes letter from Inspector Crane of Tullamore RIC Barracks giving permission in 1911 to James Brennan (Séamus O’Brennan) to play hand-ball in the alley at the barracks during weekdays. Both Crane and O’Brennan were involved in the Tullamore Incident five years later.

Also includes a copy of the charge sheet relating to the Tullamore Incident of March 1916, the original of which is in a related set of O'Brenan family papers. This copy is annotated by Alo O’Brennan, along with annotated pages from Hansard’s Debates from April 1916 relating to the ‘affray.’

Also includes an illustrated pledge signed by Alo O’Brennan in Tullamore in June 1918 ‘denying the right of the British government to enforce compulsory service...’

Also includes an autograph book created by Séamus O’Brennan in Ballykinlar internment camp (1920-21).

Collection of newspaper cuttings, off-prints and photographs relating to Irish revolutionary period, mainly dating from the 1960s. Also contains original programme of 1921 Labour Day activities in Ballykinlar Camp No. 2 featuring interned Geashill priest Fr. Burbage; and photograph of Rev J. O'Callaghan, Rev. Canon Magner and Rev. Michael Griffin, stamped 'Murdered by Crown Forces 1921' .