Hello Richards 74
I think I have James and Ann Lewis in 1841
Living in parish of St Clare(sic)
James Lewis 50 ag lab 
Ann Lewis 50
Jonah Lewis 14
Ann Lewis 4
HO107,Piece 1382/2 Folio 25/p9
I have a marriage for James Lewis, Llanfihangel Abercowin ,and Ann Thomas, St Clears, in St Clears Church - 1 Dec 1812.
The following children baptised to James and Ann Lewis in Bethlehem Chapel, Pwlltrap
1815  Dynah
1819  Anna
1822  Sarah
1825  Margaret
1828  Jonah
1831  MARTHA
1834  Liza, died 1835
1837  Ann
There is also a James Lewis bap in 1813, no parents given, who could possibly be theirs as they married in 1812.
Also in St Clears marriages is John Lewis, Llanfihangel Abercowin, to Sarah Price, St Clears - 17 May 1787 - who might possibly be James Lewis's parents.
Hope this helps
Rhosgoch