National Portrait GalleryThe Mad Bull (James Craig, 1st Viscount Craigavon; Michael Collins) cartoon, 15 February 1922
History HubDiarmaid Ferriter discusses the Anglo Irish Treaty (Full Interview) video clip, 2020
YouTube - RTEWhat role did sectarianism play in the creation of Northern Ireland? video clip, 2021
UCD Digital LibraryGroup of IFS Army soldiers firing artillery on the Four Courts photograph, 28 June 1922
History Ireland Tit-for-tat: the War of Independence in the northern counties open_in_new article, 2012
RTE Century IrelandBetween armed rebellion and democratic revolution: the Irish Question in 1917 open_in_new article, 2017
Flickr - NLIThe shell of the G.P.O. on Sackville Street after the 1916 Rising photograph, May 1916
Decade of Centenaries timelineJohn Redmond has ‘Second Thoughts’ about ‘Home Rule’ political cartoon, October 1913