UCD History Hub
Arthur Griffith, Sinn Fein and the IRB (The Irish Revolution Lecture 3)
podcast, 2014
National Archives UK
Irish Settlement: Proposals of the British government
open_in_newdocument, 20 July 1921
Houses of Oireachtas
Correspondence between de Valera and Lloyd George
open_in_newdebate, 14 September 1921