« Reply #1 on: Sunday 30 March 08 16:08 BST (UK) »
Do you have a birth certificate for one of their children? If so, go to the full GRO index, select dec qtr 1865 and Sarah plus surname and look for an entry with the same reference.
If you don't have a birth cert, either get one to find out Sarah's maiden name or take a gamble on the marriage cert.
Cornwall: Allen, Bevan, Bosisto, Carnpezzack, Donithorn, Huddy, James, Retallack, Russell, Vincent, Yeoman
Cards: Thomas (Llanbadarn Fawr)
Glam: Bowler, Cram, Galloway, James, Thomas, Watkins
Lincs: Coupland, Cram
Mon: Cram, Gwyn, John, Philpot, Smart, Watkins
Pembs: Edwards (St. Dogmael's)
Yorks: Airey, Bowler, Elliott, Hare, Hewitt, Kellett, Kemp, Stephenson, Tebb