National Museums IrelandThe last letter written by Seán Mac Diarmada (Sean MacDermott) letter, 11 May 1916
Warwick Digital CollectionsImage of Sackville Street after Rebellion in Dublin, April, 1916 booklet, April 1916
Decade of Centenaries timelineAnti-Home Rule postcard: Donegall Place, Belfast under Home Rule postcard, 1912
Down County MuseumAnti-Home Rule Postcard: Downpatrick and Assembly Hall under Home Rule postcard, 1912