Several online family trees at ancestry.com have her date of death as 10 Aug 1826, age 68, no source noted. These trees also have her maiden name as Sherman, no source noted and no parents given. They also say she was born 1758 in Exeter, RI.
However, the Richmond family book says she was Amy Richmond, and I am using the information from this book as it seems to be well done, with some images of original documents included for several individuals.
(Richmond family, 1594-1896 and pre-American ancestors, 1040-1594; Richmond, Joshua Bailey; Boston, 1981, p 69; at Heritage Quest accessed through my local library)