O'Brien, A. P., Ua Ceallaigh, S., Collins, M., Irish Self-Determination League of Great Britain, Woodgrange Press Ltd, Daily Herald, & Catholic Herald. (1919). Correspondence of Art Ó Briain with embassies and various individuals, relating to organisation of large demonstration for recognition of Irish Republic, held under Irish Self-Determination League auspices, at Royal Albert Hall (11 February 1920), with associated material including draft programme and estimates.

O'Brien, Art Patrick, et al. Correspondence of Art Ó Briain with Embassies and Various Individuals, Relating to Organisation of Large Demonstration for Recognition of Irish Republic, Held Under Irish Self-Determination League Auspices, at Royal Albert Hall (11 February 1920), with Associated Material Including Draft Programme and Estimates. 1919.