This collection is comprised of letters between Mills and University of Tennessee at Chattanooga library officials, specifically Dean of the Library, Joseph A. Jackson, concerning the books that Mill's donated to the library in the early 1990's. The books that he donated are related to Harry S Truman, economics, the United States intelligence community, Virginia Woolf, and Tennessee Williams. Also in the collection are two personal items relating to Mills: his autobiography, and a copy of his book entitled An Informal History of Technical Ceramics, which he wrote in 1995.