Youtube
The Ulster Solemn League and Covenant – BBC Documentary
TV programme, 2012
National Archives UK
Letter from Sir James Craig to the Prime Minister
open_in_newdocument, 29 July 1921
Bicycles, Barracks & Bandoliers
Memo regarding Catholic recruitment in the RUC and USC
memo, March 1922
Documents on Irish Foreign Policy
Notes of a conference with the Irish Boundary Commission
open_in_newdocument, 3 December 1925