O'Brien, A. P., Duffy, G. G., Dutton, C. B., & Irish Self-Determination League of Great Britain. (1922). Correspondence between Art O'Brien, C. B. Dutton and George Gavan Duffy, Minister for Foreign Affairs, regarding articles in the 'Catholic Herald', political prisoners in Great Britain, information relating to articles printed in the British press relating to Ireland, and applications for employment in the Provisional Government by Irish people in England, forwarded by O'Brien.

O'Brien, Art Patrick, et al. Correspondence Between Art O'Brien, C. B. Dutton and George Gavan Duffy, Minister for Foreign Affairs, Regarding Articles in the 'Catholic Herald', Political Prisoners in Great Britain, Information Relating to Articles Printed in the British Press Relating to Ireland, and Applications for Employment in the Provisional Government by Irish People in England, Forwarded by O'Brien. 1922.