« Reply #1 on: Tuesday 12 February 13 15:24 GMT (UK) »
do you have the birth cert for Edward born in Uphill? It would give you Ann's maiden name.
Edward Thomas march qtr 1850 Axbridge vol 10 pg 332
Given the age gap between daughters Ann (16) and Emma ( 8 ) are you sure that they are married by 1841? Ann could be Thomas' daughter from a previous marriage and his marriage to Ann could be after the 1841 census.

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