Hi Ruth,
Welcome to RootsChat !!
I thought CRUMPLER would be an uncommon name so I looked it up on the Dorset OPC site
www.dorset-opc.com and there were loads of 'em !!
Worth taking a look to see if there are any of yours there !
I got excited at this one, but on reflection, he's 10 years too young to be your Thomas:
East Stoke 1841 CENSUS HO107/279
Location; ; CHRISTIAN NAME; SURNAME; SEX; AGE; OCCUPATION; Born in County; Reference
Stokeford; ; William; CLAPCOTT; M; 30; Cattle Dealer; Yes; F8/p13
; ; Mary Ann; CLAPCOTT; F; 30; ; Yes; F8/p13
; ; James; CLAPCOTT; M; 8; ; Yes; F8/p13
; ; William; CLAPCOTT; M; 4; ; Yes; F8/p13
; ; Martha; CLAPCOTT; F; 5; ; Yes; F8/p13
; ; Thomas; CRUMPLER; M; 15; M.S.; Yes; F8/p13
M.S. could be male servant
Good luck,
Bob