I have finally got the copies of the marriage certificate for Henry O'NEILL (snr) and Elizabeth Rourke.
They were married at St Patrick Catholic Church in Bolton in July 1880. Henry was aged 34 (approx 1846) and a labourer living at what looks like 28 Back Soho(?) Street, Great Bolton. His father is given as John O'NEILL (deceased), labourer.
Elizabeth was 31 (approx 1849) living at 36 Back D?

Street, Great Bolton (it could be Dawes, which would match a census but it is hard to read). Her father was Thomas ROURKE (deceased) a labourer.
The witnesses were Patrick O'NEILL and what looks like an Ann REDDY or KEDDY.
Will have a look at the information you have all given me and see if it matches.