The following entry appeared in the church records of St. Peter’s Church of Ireland, Aungier Street, Dublin:
Marriage of RICHARD MCARTHUR of CULLENSWOOD, DUBLIN and MARY GRACE BERRY [Graisberry] of BATCHELORS WALK on 4 August 1825
Mary was in her late twenties at the time and Richard was somewhat older than her. The marriage was most likely a match, however they may have known one another too. Richard was one half of the partnership Hodges & McArthur Booksellers of 21 College Green for some years. Mary’s family printed the books for Trinity College across the street, so it more than likely that their paths crossed a long time before.
Sources
http://churchrecords.irishgenealogy.ie/churchrecords/
Dublin Evening Post 04 August 1825. P 3