Duffy, G. G., & Doyle, M. F. (1916). Letter from George Gavan Duffy to Michael Francis Doyle, Land Title Building, Philadelphia, noting that nothing of Roger Casement's will be published just yet due to the war, commending his idea of allowing the printed record of Casement's case to be reprinted for libraries and discussing financial aid.

Duffy, George Gavan, and Michael Francis Doyle. Letter from George Gavan Duffy to Michael Francis Doyle, Land Title Building, Philadelphia, Noting That Nothing of Roger Casement's Will Be Published Just yet Due to the War, Commending His Idea of Allowing the Printed Record of Casement's Case to Be Reprinted for Libraries and Discussing Financial Aid. 1916.