Two possibles on 1841:
Benj Howells (sic), blacksmith, age 20, living in GReen Hill, Swansea, Glamorgan; born Glamorgan.
He is living with Lavin (bargeman) Matthew, 25, and Margaret Matthew, 20.
Probably not yet married to Harriett.
TNA Ref HO107-1426
Image No 400
Folio No 9\12
Page No 16
Entry No 23
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This one also looks good, but it says he was born in Somerset. Living at York St., Bedminster.
Benjamin Howell 40 Shipwright
Harriett 39
Benjamin 16 "Do" - presume shipwright
Amalia 14
Joseph 11
John 9
Alfred 5
...ely (female) 3
TNA Ref HO107-0376
Image No 141
Folio No 12
Page No 19
Entry No 15