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
Bureau of Military History
The Minister of Defence orders that the Convention be not held
newsletter, 31 March 1922
Hathi Trust Digital Library
The struggle of the Irish people. Address to the Congress of the United States
book, January 1921
UCD History Hub
Aftermath of The Rising and 1917 By-Elections. (The Irish Revolution Lecture 5)
podcast, 2014