National Archives UK
Irish Settlement: Proposals of the British government
open_in_newdocument, 20 July 1921
National Archives
Home Rule : Government of Ireland Amendment Bill
open_in_newdocument, 23 April 1918

Bicycles, Barracks & Bandoliers
Memo regarding Catholic recruitment in the RUC and USC
memo, March 1922
Hathi Trust Digital Library
The struggle of the Irish people. Address to the Congress of the United States
book, January 1921
RTE Century Ireland
Between armed rebellion and democratic revolution: the Irish Question in 1917
open_in_newarticle, 2017