O'Brien, A. P., De Valera, É., Comyn, M., & O'Byrne, M. (1922). Correspondence between Art O'Brien and Éamon De Valera regarding attempts to gain recognition from the Red Cross concerning the abuse of Civil War prisoners, and letters concerning the visit of Kathleen O'Brennan and Dr. Kathleen Lynn to the Red Cross in Geneva.

O'Brien, Art Patrick, et al. Correspondence Between Art O'Brien and Éamon De Valera Regarding Attempts to Gain Recognition from the Red Cross Concerning the Abuse of Civil War Prisoners, and Letters Concerning the Visit of Kathleen O'Brennan and Dr. Kathleen Lynn to the Red Cross in Geneva. 1922.