Adult ages on the 1841 census were supposed to be rounded down to a multiple of 5 years.
So John's stated age of 30 means he could be aged between 30 and 34.
Therefore this baptism is looking good?
Christening Date 14th October 1810
At St John, Deritend and Bordesley, Warwickshire
Birth Date 14th August 1809
John Dolphin, son of Charles and Mary Dolphin
Spotted on FamilySearch; already typed it up, so I'll post it anyway!
