Hi mrf,
The 1841 census has several possible Benjamin Field's of the right age in Dewsbury, but only one is down as Ben
instead of a Benj* variation:
HO107/1268/5 4 1
Middle RoadRichd Field, 30, Cordwainer, yes
Susey, 30, yes
Frank, 14, Shoe m j, yes
Ben, 21? month, yes
The only way of
proving it is your man wouls be to get hold of Ben's the marriage cert, I suppose. Though as said before, he is the only 'Ben' throughout census returns.
Tanja

Marriage:
Ben Field - Barbara Exley
December quarter 1859
Dewsbury 9b 824