« Reply #2 on: Friday 16 February 07 22:15 GMT (UK) »
I'm not having much luck with the 1851 for William - loads of William Jenkins around and he's not consistent with his age.Llandeilo Talybont is the parish that covered Pontardulais, batch no C056771. There's a possible baptism for William 17/7/1825 son of William and Margaret, but that's just guesswork.
The family is enumerated in Llanrhidian Higher, not in Llanrhidian itself but in Penclawdd. Both Llanrhidian and Llanrhidian higher are covered by the IGI for this period - batch nos C073261 and C090731 respectively. Possible for Margaret but with parents William and Margaret - but they're all comon names so it could be someone else. Looks like they were non-conformist and there were many chapels in the area - check Genuki page for chapels database.
Probably your best way would be to go for certificates. The Gower registration district came into being in 1858, so I'd go for births after that. Best bet looks to be Jane
Jane Jenkins march qtr 1868 Gower vol 11a pg 597
There's a couple of possible Davids and Sarahs, whereas that's the only Jane for a few years. The marriage would be registered Swansea and there are far too many William Jenkins marrying Marys to even hazard a guess, but maiden name from marriage cert might help.
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