National Archives UK
Letter from General Smuts to Eamon de Valera
open_in_newletter, 4 August 1921
Google Arts and Culture
Memorandum from Arthur Griffith to de Valera on Ulster
open_in_newdocument, 8 November 1921
National Archives UK
Cabinet Memorandum – Ireland (Draft Constitution)
open_in_newdocument, 1 June 1922