YouTube - RTEWhy did Edward Carson not become Northern Ireland’s Prime Minister? video clip, 2021
Houses of OireachtasDáil Debate: executions of four IRA leaders open_in_new speech, 8 December 1922
UCD Digital LibraryGroup of IFS Army soldiers firing artillery on the Four Courts photograph, 28 June 1922
National Archives UK Cabinet Memorandum – Ireland (Draft Constitution) open_in_new document, 1 June 1922