O'Brien, A. P., & O'Brien, M. (1920). Correspondence between Art O'Brien and Máire O'Brien regarding Spanish translations of Irish propaganda, the sale of a portrait of Terence MacSwiney to raise funds for the White Cross, and the possibility of closing the office in Madrid. Also includes several letters to Father O'Doherty at the Irish College in Salamanca.

O'Brien, Art Patrick, and Máire O'Brien. Correspondence Between Art O'Brien and Máire O'Brien Regarding Spanish Translations of Irish Propaganda, the Sale of a Portrait of Terence MacSwiney to Raise Funds for the White Cross, and the Possibility of Closing the Office in Madrid. Also Includes Several Letters to Father O'Doherty at the Irish College in Salamanca. 1920.