Clemson, Thomas Green, 1807-1888
Writing about activity at O'Bar Mine.
Clemson, Thomas Green, "Transcript, July 16, 1842, of letter from Thomas Green Clemson to John C Calhoun" (1842). Thomas Green Clemson Papers, Mss 2. 138.
Clemson University Libraries
Clemson University Works. http://purl.clemson.edu/culrights