Clyde Martin Caswell was a radio pioneer in the 1940s and 1950s whose on-air name was Jim Christie. He also served as the head of the Columbia College Radio Department and later, as Dean of Students at the college. The collection strength lies in its radio recordings from the time period. The collection dates span from the late 1940s to the late 1950s and measures 4 cubic feet. Caswell died in 1958 in Evanston, Illinois.