Have you found any more information on Lydia Dow? I've also been trying to trace her. The only additional information I have concerns her death: 10 Dec 1840 in Windsor, Quebec, Canada. Her people may have come from the Salisbury/Newbury/Rowley region of Massachusetts. At least, the Boyntons came from there, and several years ago when I was looking for old Boynton graves, I noticed quite a few Dow graves in Salisbury. Unfortunately, I haven't had another chance to go to Salisbury to look in detail at the Dow graves.