This is Elizabeth VAIL SMITH on the 1851 census:
1851 Census Lambeth, Kennington, 4 Upper Kennington Lane, Lambeth, Surrey HO107/1573/157 p9:
Jonah Smith Head Mar 65 Corn Dealer (Master) Wootoon Oxfordshire
Elizabeth Smith Wife Mar 57 Maidenhead, Berkshire
Frances M. Smith Niece Unm 16 Westminster, Middlesex
Ann Bennett, Servant Widow 47 Cookham, Berkshire
Interestingly enough, Jonah was baptised 20 Jan 1793 at St. Mary Lambeth, Surrey. I can find nothing on the birth/baptism for his wife, Elizabeth VAIL. She was buried 10 March 1855 at Norwood Cemetery, Lambeth, Surrey. Age given 61 years.
Glenys