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
History Ireland Tit-for-tat: the War of Independence in the northern counties open_in_new article, 2012
Bureau of Military HistoryThe Minister of Defence orders that the Convention be not held newsletter, 31 March 1922
Decade of Centenaries timelineSir Edward Carson’s souvenir parchment of the Ulster Covenant document, 28 September 1912