I actually have a daguerreotype of Lydia Sawyer. Her name is scratched in the image with the date 1851 with the word "Avon." I have collected antique photography over the years and picked it up at a farm auction or flea market. It is one of the few daguerreotypes I have where the person is actually identified. If someone of her descent has a really strong interest in this I might be willing to part with it for nothing.
(I only hope that someone would do the same, per my only ancestors).