The collection of Harrison John Thornton consists of six boxes of materials divided into three main categories: research materials, teachings, and written publications by Thornton. Within Boxes 1 and 2 of the research materials are bibliographies, correspondence, and newspaper clippings. The research materials in Boxes 3-6 consist of information on note cards kept in Thornton's original order.

Extensive research notes for a book (never published?) bibliographic information, correspondence, term papers written by students