Google Arts and CultureMemorandum from Arthur Griffith to de Valera on Ulster open_in_new document, 8 November 1921
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
Houses of OireachtasCorrespondence between de Valera and Lloyd George open_in_new debate, 14 September 1921