The National Archives has a website called Docs Teach meant for teachers to have access to thousands of primary documents for teaching purposes. The site is divided into historical eras and I clicked on the 1754-1820s link. There are a number of family trees there and imagine my surprise to find my own ancestors Thomas and Bridget Pinkham! This is the Docs Teach page. This is my own blog posting on the very same Bible. I recognized it instantly. Very cool that my direct matrilineal ancestor is on the National Archives site. However, you should check some of the other old family trees. Maybe your ancestor is there too.