His ancestry is also detailed in Landed Gentry of Great Britain, by John Bernard Burke, 1939, p.2899. This has been reprinted in Burke's Distinguished Families of America and American Families with British Ancestry, Gen. Publ. Co., Baltimore, 1975. He claimed descent from Tobias Saunders of Northamptonshire, which I have never been able to verify. My immigrant ancestor was Tobias Saunders of Westerly, R.I., and I wrote to Wilbur's son, Louis Peck Sanders, of Butte, Montana, seeking proof but never had a reply. If you are related to him I'd like to hear from you.