You may already have this information:
St Mary's R. C. Church, Hill St. Douglas
marriage
Joseph Devlin, 40 Allan St Douglas, son of Hugh
to Mary Teresa Walsh, 40 Allan St, daughter of Laurence.
Hugh & Ann Devlin were witnesses.

I can't see a baptism for Mary Teresa in St Mary's, so presumably she was baptised in Ireland.

There are more records of Devlin family if you need them. Marie Radcliffe