O'Brien, A. P., Dutton, C. B., Mulcahy, R., Irish Independent, & Communist Party of Great Britain. (1922). Correspondence between Art O'Brien and various people including a letter to Richard Mulcahy regarding requests for several members of the London I.R.A to transfer to Dublin, list of unemployed I.R.A men in the London area, memo to George Gavan Duffy concerning English plans for a Civil War in Ulster, letter from O'Brien to the 'Irish Independent', a letter from the Communist Party of Great Britain, and a letter from George Noble Plunkett regarding the elections.

O'Brien, Art Patrick, et al. Correspondence Between Art O'Brien and Various People Including a Letter to Richard Mulcahy Regarding Requests for Several Members of the London I.R.A to Transfer to Dublin, List of Unemployed I.R.A Men in the London Area, Memo to George Gavan Duffy Concerning English Plans for a Civil War in Ulster, Letter from O'Brien to the 'Irish Independent', a Letter from the Communist Party of Great Britain, and a Letter from George Noble Plunkett Regarding the Elections. 1922.