The Ammon Underwood House. A structure erected in noted old river port town of Marion in Republic of Texas era. First portion, of hand-hewn cedar, was built about 1835 by colonist Thomas W. Nibbs. Merchant-civic leader- soldier Ammon Underwood (1810-87) bought and enlarged house in 1838-39. In 1839 he married Rachel Jane, daughter of William and Catherine Carson, of Austin's original colony. President Anson Jones and other famous Texans often visited the Underwoods. Recorded Texas Historic Landmark - 1970 #9612