Irish Republican Brotherhood. Supreme Council, Ó Muirthile, S., Hurley, J., & O'Donoghue, F. (1921). Correspondence of the Supreme Council of the Irish Republican Brotherhood mainly concerning a case against Donal Óg O'Callaghan, with General Order and letter from ‘Acting County Centre’ Elections of County Officers, resolution, petition and list of Brigade and District Officers for County Cork.

Irish Republican Brotherhood. Supreme Council, et al. Correspondence of the Supreme Council of the Irish Republican Brotherhood Mainly Concerning a Case Against Donal Óg O'Callaghan, with General Order and Letter from ‘Acting County Centre’ Elections of County Officers, Resolution, Petition and List of Brigade and District Officers for County Cork. 1921.