This looks to be the family in 1841:

Name   Sex   Age   Birth Year Occupation Where Born

WILLIAMS, Philip M 60 1781
WILLIAMS, Jane F 50 1791
WILLIAMS, Sarah Jane F 20 1821
MANSFIELD, Caroline F 25 1816
AMBROSE, William M 45 1796 Middlesex
SIMMS, Sarah F 33 1808
MASON, Mary F 19 1822
REEVES, Ann F 25 1816
WAKE, Emily F 20 1821

RG number: HO107 Piece: 672 Book/Folio: 7/40 Page: 25    
  
Registration District: St Giles in the Fields & St George Bloomsbury
Sub District: St George Bloomsbury
Enumeration District:   Ecclesiastical Parish:
  
Civil Parish: St George Bloomsbury Municipal Borough: Finsbury
Address: Bedford Place, Upper, St George Bloomsbury, Finsbury
County: Middlesex
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This has to be her in the 1851 census:

Name   Relation   Condition   Sex   Age   Birth Year  Occupation  Disability  Where Born

WILLIAMS, Jane Head Widow F 63 1788   Whippingham, I of Wight, Hampshire
MARSHALL, John Servant Unmarried M 25 1826  House Servant  St Peter's, Nottinghamshire
SIMS, Sarah Servant Unmarried F 44 1807 House Servant  Easton, Hampshire
THORNTON, Emma Servant Unmarried F 26 1825  House Servant  Landford, Wiltshire
SIMS, Eliza Servant Unmarried F 16 1835 House Servant  Easton, Hampshire

RG number: HO107 Piece: 1674 Folio: 314 Page: 13    
  
Registration District: Winchester Sub District: Winchester
Enumeration District: 12 & 17 Ecclesiastical Parish:
  
Civil Parish: St Michael Winchester Municipal Borough: Winchester
Address: 55, Kingsgate Street, St Michael Winchester, Winchester
County: Hampshire
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This is probably her death, the only JW death in Hants between 1854 and 1856:

Surname   First name(s)   Age   District   Vol   Page
Deaths Mar 1855   (>99%)
WILLIAMS Jane Winchester 2c 76
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