On November 28, 1760, Thomas bought land in Amelia County which had been the estate of Colonel Edward Booker, half brother of George Booker. It was here that Thomas and Sarah made their home, and where Thomas served as High Sheriff in 1779. For several generations a Mumford and Munford family lived side-by-side in Amelia County, and at times interchanged in records and reports of these families. Thomas used the 'm' spelling, and may have been a descendant of the Thomas Mumford (Mountfort) who came to Virginia on the ship "First Supply", and was a member of the second Virginia Company of London in 1609.