O'Brien, A. P., McGrath, J., Ó Donnchadha, D., Duffy, G. G., & Collins, M. (1922). Correspondence between Art O'Brien and Joseph McGrath, Accountant General, regarding the accounts of the London Office and further correspondence with George Gavan Duffy, Michael Collins and Arthur Griffith after the London Office accounts have been audited and his position has been terminated.

O'Brien, Art Patrick, et al. Correspondence Between Art O'Brien and Joseph McGrath, Accountant General, Regarding the Accounts of the London Office and Further Correspondence with George Gavan Duffy, Michael Collins and Arthur Griffith After the London Office Accounts Have Been Audited and His Position Has Been Terminated. 1922.