National Portrait Gallery
The Mad Bull (James Craig, 1st Viscount Craigavon; Michael Collins)
cartoon, 15 February 1922
BBC - Story of Ireland
Story of Ireland: James Craig and the Catholic Minority
open_in_newvideo clip, 2014
History Ireland
The Boundary Commission Debacle 1925, aftermath & implications
open_in_newarticle, 1996
National Archives
Home Rule : Government of Ireland Amendment Bill
open_in_newdocument, 23 April 1918

Bicycles, Barracks & Bandoliers
Memo regarding Catholic recruitment in the RUC and USC
memo, March 1922
Hathi Trust Digital Library
The struggle of the Irish people. Address to the Congress of the United States
book, January 1921
RTE Century Ireland
Between armed rebellion and democratic revolution: the Irish Question in 1917
open_in_newarticle, 2017
RTE Century Ireland
Rebel leader Thomas Ashe arrested for inflammatory speech
open_in_newarticle, 2017
Decade of Centenaries timeline
John Redmond has ‘Second Thoughts’ about ‘Home Rule’
political cartoon, October 1913