RTE
Northern Ireland 1921-1925: a state of emergency
open_in_newarticle, 2021
National Archives UK
Letter from Lloyd George inviting Craig and de Valera to a conference
open_in_newdocument, 24 June 1921
Google Arts and Culture
Instructions to Plenipotentiaries from Cabinet
open_in_newdocument, 7 October 1921