February 24, 1841John Philip Holland, inventor and developer of the modern submarine, born in Co. Clare
September 3, 1842In Kill, Co. Kildare, birth of John Devoy, journalist and leading member of the Fenians
June 10, 1842The first number of James MacKnights “Banner of Ulster”, the newspaper of the Presbyterian Church, is published in Ulster
May 25, 1842Birth on Valentia Island, Co. Kerry, of Helen Blackburn, early leader of the movement for the emancipation of women
August 15, 1843Daniel OConnell holds meetings for Repeal of the Union, attended by hundreds of thousands, at Trim and the Hill of Tara