Site of Riley family homeplace, owners of Josiah Henson, one of the characters on which Harriet Beecher Stowe based her 1852 novel Uncle Tom's Cabin. Henson served as overseer of Amos Riley's farms, 1825-29. On learning owner planned to sell him "down the river," he escaped to Canada, living there rest of life. Invited to visit Mrs. Stowe in Andover, Mass., 1849.