27 Frederick St, Regents Park, Middlesex, England
I was able to trace this Ambrose family, which left Hatfield for Marylebone sometime between 1803 and 1812, through Charlotte because 1) in the '61 census she indicated she was born in Hatfield, and 2) she remained unmarried and lived with other family members.
St Etheldreda Hatfield, Call Number: HALS/DP/46, Baptismal Registers (BT)
Repository: Hertfordshire Archives and Local Studies
1851 England and Wales Census, Call Number: TNA/HO107
1861 England and Wales Census, Call Number: TNA/RG9
Repository: The National Archives of the UK, Kew, Surrey, England
↑Folio: 1495/735; Line: 44-10; Film: 87827, Charlotte Ambrose, Visitor, Unmarried, 47y, House Servant, b Atfield, Herts, Hsehold: George Dixon, Head, Married, 33y, Letter Carrier, RegDist: Pancras; EnumDist: St Pancras, Grays Inn Lane; Addr: 83 Harrison Street
↑Folio: 95/81; Line: 30-4; Film: 542572, Charlotte Ambrose, Daughter, Unmarried, 59y, b Hatfield, Hsehold: Sarah Ambrose, Head, Married, 74y, RegDist: Pancras; EnumDist: St Pancras, Regents Park; Addr: 27 Frederick St
Thank you to Alan Sinclair for creating WikiTree profile Ambrose-179 through the import of gedcom on Jun 6, 2013. Click to the Changes page for the details of edits by Alan and others.