Doyle, M. F., & Duffy, G. G. (1916). Letter from Michael Francis Doyle to George Gavan Duffy referring to a letter received from Henry Blackwell in which he refused to allow Doyle to travel to Germany for evidence in relation to the trial of Roger Casement.

Doyle, Michael Francis, and George Gavan Duffy. Letter from Michael Francis Doyle to George Gavan Duffy Referring to a Letter Received from Henry Blackwell in Which He Refused to Allow Doyle to Travel to Germany for Evidence in Relation to the Trial of Roger Casement. 1916.