O'Brien, A. P., O'Brien, G., & McGrath, S. (1923). Documents relating to Art O'Brien's imprisonment in Wormwood Scrubs Prison including a statement of conditions, letters from the Governor of the prison and the Home Office to Geraldine O'Brien, and a statement from O'Brien and Seán McGrath concerning the establishment of a rival Republican organisation being formed in London.

O'Brien, Art Patrick, et al. Documents Relating to Art O'Brien's Imprisonment in Wormwood Scrubs Prison Including a Statement of Conditions, Letters from the Governor of the Prison and the Home Office to Geraldine O'Brien, and a Statement from O'Brien and Seán McGrath Concerning the Establishment of a Rival Republican Organisation Being Formed in London. 1923.