c. March - Newry Canal opened. On 28 March the Cope brings the first load of Tyrone coal carried from Lough Neagh to Dublin by this route.
13 April - First performance of Handel's Messiah staged at the Music Hall in Fishamble Street, Dublin. Matthew Dubourg leads the orchestra. Handel leaves Ireland on 13 August.
John Prendergast Smyth, 1st Viscount Gort, politician (died 1817).
September 27 - Hugh Boulter, Anglican Primate of All Ireland (born 1672)
James Arbuckle, poet and critic (born 1700).
1742 in Ireland Wikipedia
Events from the year 1742 in Ireland.