This is the marriage of William White to Maria Beal in 1834:
https://search.findmypast.co.uk/reco...2F00020951%2F2
The witnesses Pamela Charity Newman and John Street subsequently married and may well have been friends, rather than relations.
Maria appears to have been the daughter of John Beal:
https://search.findmypast.co.uk/reco...BAP%2F00057303
She is baptised 30 August 1813. John is a seamn of Spring Street, and no mother is mentioned.
This appears to be her parents' marriage: John Beal to Mary Stroud in October 1812
https://search.findmypast.co.uk/reco...2F00027317%2F1
The witnesses were Emma Sexton, who could write, but of whom I find no further mention, and James Bridger, who may have been the James who married Sophia Saxey at St Marys Portsea in 1822. He was a seaman, living in 1842 in Chance Row.
John and Mary then vanish from the scene. John had been a widower when he married. I can find no other children for them, nor their deaths.
Anyone have any better luck?