FYI, Elizabeth Heysham was the daughter of James and Elizabeth Heysham. James Heysham married Elizabeth Dobney on 26 April 1816 at Christ Church Greyfriars Newgate, London.

"James Heysham of this Parish Bachelor & Elizabeth Dobney of the Same Parish Spinster were married in this Church by Banns the Twenty Sixth Day of April in the Year One Thousand Eight Hundred and Sixteen" - from "London, England, Marriage and Banns, 1754-1921"

This couple had a child, Elizabeth, who was baptized on 8 September 1816 [5 months after her parents wedding]. James Heysham's occupation was given as Cooper. Elizabeth Heysham married Daniel Drury on 3 November 1833 in St. Giles, Camberwell, Southwark, Surrey. It's fairly clear this was Elizabeth Dobney's daughter because one of the witnesses was Mary Ann Dobney, perhaps her aunt.