RTE Century Ireland Introducing de Valera – The East Clare by-election and the rise of an Irish political leader open_in_new article, 2017
Hathi Trust Digital LibraryThe struggle of the Irish people. Address to the Congress of the United States book, January 1921
Decade of Centenaries timelineIrish Delegation travels to London July 1921 photograph, July 1921
National Archives UKLetter from Sir James Craig to the Prime Minister open_in_new document, 29 July 1921