National Portrait GalleryThe Mad Bull (James Craig, 1st Viscount Craigavon; Michael Collins) cartoon, 15 February 1922
UCD Digital LibraryGroup of IFS Army soldiers firing artillery on the Four Courts photograph, 28 June 1922
National Archives UK Cabinet Memorandum. Ireland – Capture of Four Courts. open_in_new document, 30 June 1922
RTE Century IrelandBetween armed rebellion and democratic revolution: the Irish Question in 1917 open_in_new article, 2017
UCD History HubAftermath of The Rising and 1917 By-Elections. (The Irish Revolution Lecture 5) podcast, 2014
Decade of Centenaries timelineJohn Redmond has ‘Second Thoughts’ about ‘Home Rule’ political cartoon, October 1913