Malcolm P. Tyor (1923-2003) was chief of the Division of Gastroenterology at Duke University Medical Center for twenty years (1965-1985). His wife, Anne Bradfield Tyor (1925-2012), graduated from the Duke University School of Dietetics in 1946. This collection contains personal and professional correspondence, mailing lists and other materials for organizing class reunions, drafts of talks, film, photographs, certificates, and plaques. The bulk of the collection consists of the papers of Malcolm P. Tyor. Anne Bradfield Tyor is a correspondent and a subject of correspondence in the class reunion materials. Major subjects include the Duke University School of Medicine; Duke Medical Center; the Division of Gastroenterology; Tyor's extensive involvement in professional networks and organizations in gastroenterology, medical research; alumni of the Duke University School of Medicine; gastroenterologists who maintained professional connections with Malcolm P. Tyor; and reunion materials from members of the Duke University School of Medicine class of 1946. Materials range in date from 1943 to 2006.