RTE Century IrelandSinn Féin leaders arrested over alleged ‘German plot’ open_in_new article, 2018
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
National Archives Application of Military Service Act to Ireland open_in_new document, 26 March 1918
Bureau of Military HistoryThe Minister of Defence orders that the Convention be not held newsletter, 31 March 1922