April 18

• 1952 Edmund O’Brien (71), County Limerick-born author and yachtsman who in 1923 circumnavigated the globe in his ketch Saoirse, died.
• 1870 Robert Noonan, house-painter, sign-writer and author, notably of The ragged-trousered philanthropists (1914), born Robert Croker, the illegitimate son of an RIC officer, at 37 Wexford Street, Dublin.
• 1949 Under the terms of the Republic of Ireland Act (December 1948), designed by John A. Costello’s coalition government to ‘take the gun out of Irish politics’, Ireland formally left the Commonwealth and became a republic.
• 1918 The Mansion House conference, called by the lord mayor of Dublin, Laurence O’Neill, on the day the Military Service Bill became law, was attended by all shades of nationalist opinion. An anti-conscription pledge, drafted by Éamon de Valera, was issued.
• 1870 Robert Tressell, nom de plume of Robert Croker, latterly Robert Noonan, author of The Ragged Trousered Philanthropists (first unabridged edition published in 1955), was born in Dublin, the illegitimate son of RIC inspector and later magistrate Sir Samuel Croker.
• 2019 The journalist Lyra McKee (29) was shot dead by a New IRA gunman who opened fire on PSNI officers monitoring disturbances in Derry’s Creggan area. President Michael D. Higgins and Taoiseach Leo Varadkar attended her funeral.