National Archives UK Letter from General Smuts to Eamon de Valera open_in_new letter, 4 August 1921
Decade of Centenaries timelineIrish Delegation travels to London July 1921 photograph, July 1921
Decade of Centenaries timelineBallytrain RIC barracks captured and sacked by the IRA. photograph, 1920
UCD History HubAnglo-Irish War/War of Independence (The Irish Revolution Lecture 7) podcast, 2014