O'Brien, A. P. (1922). Documents relating to promoting the Republican cause in the Civil War, including a leaflet for the Irish Republican Soldiers and Prisoners Dependent Fund, a copy of O'Brien's speech at a Republican meeting, and press cuttings concerning the Irish Self-Determination League of Great Britain. Also includes two letters appealing to O'Brien to stop supporting the Civil War.

O'Brien, Art Patrick. Documents Relating to Promoting the Republican Cause in the Civil War, Including a Leaflet for the Irish Republican Soldiers and Prisoners Dependent Fund, a Copy of O'Brien's Speech at a Republican Meeting, and Press Cuttings Concerning the Irish Self-Determination League of Great Britain. Also Includes Two Letters Appealing to O'Brien to Stop Supporting the Civil War. 1922.