Antiquarians exchanged letters and maps about frontier “wonders” such as the Old Stone Fort. The earliest surviving letter referring to the Old Stone Fort was written by Sam Mitchell in 1810. The earliest known map appears to date from about the same time and may be attributable to the naturalist C. S. Rafinesque, although it says only that it was surveyed in 1810, not when it was drawn. Donnison’s map appeared in 1819, and an improved Rafinesque map in 1821. Klinkowstrom’s map appeared in Sweden in 1826. In 1876, Joseph Jones of Louisiana investigated the site and recovered a raptor-shaped pipe now housed in the Smithsonian. In 1929, Tennessee archaeologist P.E. Cox conducted investigations at the Old Stone Fort, and his notes provided valuable clues to the next archaeologist to work at the site. In 1966, the University of Tennessee’s Alfred K. Guthe and J.B. Graham conducted the largest investigations at the site, and their work was published by Charles Faulkner. In 2006–2009, Stephen Yerka used geophysical remote sensing techniques to study the site and direct limited excavation under the direction of the University of Tennessee’s Dr. Gerald Schroedel.