YouTube - RTEWhat role did sectarianism play in the creation of Northern Ireland? video clip, 2021
History Ireland Tit-for-tat: the War of Independence in the northern counties open_in_new article, 2012
National Archives Home Rule : Government of Ireland Amendment Bill open_in_new document, 23 April 1918
Hathi Trust Digital LibraryThe struggle of the Irish people. Address to the Congress of the United States book, January 1921