NLI
Message of Dáil Eireann to the Free Nations
leaflet, 21 January 1919
Decade of Centenaries timeline
Ireland’s Solemn League and Covenant: Anti-conscription protest form
document, April 1918
UCD History Hub
Arthur Griffith, Sinn Fein and the IRB (The Irish Revolution Lecture 3)
podcast, 2014