YouTube - RTEWhy did Edward Carson not become Northern Ireland’s Prime Minister? video clip, 2021
Google Arts and CultureMemorandum from Arthur Griffith to de Valera on Ulster open_in_new document, 8 November 1921
Houses of OireachtasCorrespondence between de Valera and Lloyd George open_in_new debate, 14 September 1921
UCD History HubAftermath of The Rising and 1917 By-Elections. (The Irish Revolution Lecture 5) podcast, 2014