YouTube - RTEWhat role did sectarianism play in the creation of Northern Ireland? video clip, 2021
National Archives UK Letter from General Smuts to Eamon de Valera open_in_new letter, 4 August 1921
Documents on Irish Foreign Policy The Collins – Craig agreement open_in_new document, 23 January 1922
National Portrait GalleryThe Mad Bull (James Craig, 1st Viscount Craigavon; Michael Collins) cartoon, 15 February 1922