I'm looking specifically for Frances Mary Bridgeman, a spinster living on Great Russell St. in 1812-14, and a brother or other relative, William. She may have been born around 1755. She is named in the 1812 will of spinster Harriet Cardin, wrote a codicil in 1814 saying she knew Harriet well and her handwriting.

She had a child of the Richard Cardin family (Harriet's brother) named after her born in the West Indies in 1819; the Cardin, Chiles, and Gillett families lived/had houses in Bloomsbury around 1805-1810 and any of those names may be related to the Bridgeman one, especially in relation to St. George's, Bloomsbury.