Hi Ruby
We'd really really like to help you! But finding it a bit difficult to get a handle on it - so some more questions if you don't mind!
If your cousin has stated his name, her name, their ages and places of birth and his occupation - it sounds like she may have the actual marriage certificate and maybe census? If the marriage cert, then what dids it say for their father's names? and the names of the witness'?
Who is the next generation(s) down FROM them, that you have connection to, could we start from there maybe - and did the family stay in England as far as you know?
Cheers
AMBLY