O'Brien, A. P., & Duffy, G. G. (1922). Correspondence between Art O'Brien and George Gavan Duffy, Minister for Foreign Affairs, regarding political prisoners in Great Britain, the establishment of an embassy in London, the London edition of the 'Irish Bulletin', and several applications for employment forwarded by O'Brien from Irish people living in England.

O'Brien, Art Patrick, and George Gavan Duffy. Correspondence Between Art O'Brien and George Gavan Duffy, Minister for Foreign Affairs, Regarding Political Prisoners in Great Britain, the Establishment of an Embassy in London, the London Edition of the 'Irish Bulletin', and Several Applications for Employment Forwarded by O'Brien from Irish People Living in England. 1922.