I think we have exchanged info a few years ago on the Bath County list, we are double cousins thru Gordon Griffen and also Abraham Becraft.
I have a copy of the book also but have been trying to find more information on the life of Benjamin Becraft.Can't find any mention at all of his captivity in Detroit.
Also hard to believe this story wasn't passed down somewhere but can't find anyone who has heard anything about it.My grandmother never mentioned it. . I'm only 20 minutes from Detroit and was hoping to find something on the Treaty of Grenville, list of prisoners exchanged, or something.Will let you know.