O'Brien, A. P., & O'Hegarty, D. (1920). Correspondence between Art O'Brien, in the London Office, and Diarmuid O'Hegarty regarding the relation between the Dáil Departments and the offices abroad, the unsuitability of employing George Chatterton-Hill in Germany and forwarding information and communications from Irish representatives abroad.

O'Brien, Art Patrick, and Diarmuid O'Hegarty. Correspondence Between Art O'Brien, in the London Office, and Diarmuid O'Hegarty Regarding the Relation Between the Dáil Departments and the Offices Abroad, the Unsuitability of Employing George Chatterton-Hill in Germany and Forwarding Information and Communications from Irish Representatives Abroad. 1920.