Northern Ireland 1921-1925: a state of emergency
open_in_newBritish Academy
Political History of Northern Ireland since Partition
open_in_newArticle, 1999
National Archives UK
Letter from General Smuts to Eamon de Valera
open_in_newletter, 4 August 1921
National Archives UK
Letter from Sir James Craig to the Prime Minister
open_in_newdocument, 29 July 1921
National Archives
Home Rule : Government of Ireland Amendment Bill
open_in_newdocument, 23 April 1918
Hansard
Government of Ireland Bill Debate – Chief Secretary of Ireland
open_in_newdebate, 29 March 1920
Bodleian Library blog
100 years ago: Constitutional Crisis and the Parliament Act of 1911
open_in_newarticle, 2011