Hi Joe (& Dave)
This had me going as well!
Unfortunately if you check the Richard & Maria family in 1861 then Thomas is still living with them. The Thomas that Dave is looking for, is a servant on Hurst Farm in Westbury at the time of the 1861 census (assuming Ive got the one hes referring too!).
Anyway, this is my best calculated guess (although his age is dodgy).
1851 Wales (don't you love places on the border)
Ref: HO107/1991/166 Page 15
Address: Crew Green, Township of Bauseley (a couple of miles north west of Alberbury his birth place quoted in 1861)
Thomas Jones Head M 31 Maltster 1 man 1 boy Montgomery, Guildsfield
Martha Jones Wife M 29 Montgomery, Lland?nio
La??sa Jones Daur 6 Montgomery, Alberbury
Infant Daur 1month Montgomery, Alberbury
Elizabeth Jones Visitor U 28 Montgomery, Guildsfield
Thomas Bel?h Servt U 1? Montgomery, Alberbury
Thomas Pryce Servant Widower 61 Malt Maker Montgomery, Guildsfield
? in place of unreadable letters. I cant honestly make the missing letter a c in his surname. The second figure on his age may be 4, hence the age being a bit dodgy.
Anyway, its the best I can come up with. Good luck with the hunt.
John