A helping hand needed please

[Trees]

A huge brick wall needs a few more eyes please
I am looking for Benjamin and Mary Davies
Benjamin died before 1851 possibly before 1841
Mary was born in Narbeth Pembrokeshire about 1784 she is on the 1841 and 1851 censuses
They had at least two sons
Thomas b about 1820 Narbeth
William b about 1829 Narbeth
And possibly George who is 20 on the 1841 census with Marybut of course no relationship is shown. nothing else is known about George

From 1851 census HO107/2462 fo322 p39
Thomas DAVIES 31 a Farrier from Narberth was with his wife Mary, twin sons Hopkin B and Thomas J, daughter Emma J, his mother Mary, brother William and 3 step daughters; Mary, Hannah and Ann THOMAS. They had a servant Elizabeth EVANS 20 a House Servant from Penhydd, Pembroke and Edmund MOSSES 22 an assistant furnace charger from Llanfynydd, Monmouth was lodging with them.
Nothing else found of them

William (direct line)
Marriage at   Parish Church in the parish of Michaelstone
in the County of   Glamorgan
When      16th May 1855
Name      X William DAVIES   X Elizabeth JONES
Rank      Labourer      -
Residence   Cwm Avon   Cwm Avon
Father      Benjamin DAVIES   Evan JONES
Profession   Labourer      Labourer


1851,61,71 81 & 91 censuses from Narbeth each time except 1871 when he was from Llangynog Carm and his wife from Narbeth looks like this was back to front

If anyone can help in anyway I would be very grateful I'm going cross eyed looking for them 
Trees