Hathi Trust Digital LibraryThe struggle of the Irish people. Address to the Congress of the United States book, January 1921
National Archives UKLetter from Sir James Craig to the Prime Minister open_in_new document, 29 July 1921
National Archives UK Cabinet Memorandum. The Irish Situation. open_in_new document, 30 May 1922
Google Arts & CultureWar News No.3- Anti-Treaty Newsletter open_in_new newsletter, 30 June 1922