As mentioned in my Reply #26 --
The OP references a "Mrs Fawkes of Carlton Chambers, Regent Street, London" in connection with sisters Louisa and Sarah.
In the 1841 census there's a Joseph & Eliza Fawkes residing at Carlton Chambers with two teenagers (Eliza and Edward). Joseph and Eliza are both servants. Note: Edward was born in Essex in 1826.
UPDATED:
Joseph Fawkes died in 1849. His widow Elizabeth marries again in December 1854:
Elizabeth Fawkes (nee Maslin), widow
George Stacey, widower, occupation: Porter
Both of this parish: Paddington
Fathers: John Maslin (Servant) and William Stacey (farmer)
Witnesses: handwriting is terrible, so unable to decipher the names
1851 census - Unable to locate widow Elizabeth Fawkes
1861 census - George and Elizabeth Stacey at Carlton Chambers, 4 Regent Street. According to the census, Elizabeth was born 1805 in London.
Elizabeth died in 1866 and is buried in Brompton Cemetery (Residence is 4 Regent Street).
1866 - St. James Westminster, London
Stacey, Elizabeth (age 63)
So, this connects Jane Maslin to Elizabeth Maslin. Possibly sisters? And how are they related to "Aunt Sarah" from Wiltshire?