1851 England Census
HO107/2443; Folio: 557; Page: 4
Lydney

James Halford - Head - Mar - 52 - Blacksmith Master employing 2 men & 1 boy - Gloucestersh, Newent
Maria Halford - Wife - Mar - 50 - Gloucestersh, Clearwell
Thomas Halford - Son - U - 18 - Blacksmith - Gloucestersh, Aylburton
Henry Halford - Son - 7 - Scholar - Gloucestersh, Aylburton
Frederick Jaine - Lodger - U - 24 - Blacksmith - Herefordsh, Kembolton
Emily Allen - Servt - U - 17 - Servt - Gloucestersh, Lydney.

It appears she was a servant to James Halford's household.