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
Bureau of Military HistoryThe Minister of Defence orders that the Convention be not held newsletter, 31 March 1922
Decade of Centenaries timelineUnionist Clubs and Orangemen en route to Balmoral Showgrounds photograph, April 1912