National Portrait Gallery
John Dillon
photograph & RIA Biography
YouTube - RTE
Ireland 1912-1916: An Animated History from Home Rule to Easter Rising
video clip, 2016
National Archives
Application of Military Service Act to Ireland
open_in_newdocument, 26 March 1918
UCD History Hub
Aftermath of The Rising and 1917 By-Elections. (The Irish Revolution Lecture 5)
podcast, 2014