This afternoon I looked again at the marriage of a Fanny Pickwick to James Sweeting in London in 1787. Who were the parents of Fanny? The witnesses were not family members so no easy clues.
I looked at the likely candidates and found Fanny, daughter of Elias Pickwick and Esther (Stout).
I then searched the LDS site (familysearch) and found that James and Fanny Sweeting had some children baptised in London. One was a daughter named Esther. This was circumstantial evidence that I had the correct Fanny Pickwick.
I then searched findmypast for any Sweeting burials in London. I found a burial for Fanny Sweeting in 1802, age 36.
The age at burial is a perfect for Fanny Pickwick daughter of Elias and Esther.
I am always happy when things come together. I am going to add this marriage to my database now.