National Portrait GalleryThe Mad Bull (James Craig, 1st Viscount Craigavon; Michael Collins) cartoon, 15 February 1922
Warwick Digital CollectionsImage of Sackville Street after Rebellion in Dublin, April, 1916 booklet, April 1916
National Museums IrelandEaster Sunday Manouevres, 1916 / mobilisation order document, 21 April 1916