1. Union District, South Carolina surveyed by R. Thompson, 1820, improved for Mills' Atlas, 1825, engraved by H.S. Tanner and assistants Creator: Thompson, R. (Surveyor) and Tanner, Henry Schenck, 1786-1858 (Engraver) Collection: South Caroliniana Library Map Collection Institution: University of South Carolina. South Caroliniana Library