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
Houses of OireachtasCorrespondence between de Valera and Lloyd George open_in_new debate, 14 September 1921
Flickr - NLIMilitary carrying out official reprisal following an ambush in Meelin, Co. Cork photograph, January 1921
National Museums IrelandThe last letter written by Seán Mac Diarmada (Sean MacDermott) letter, 11 May 1916