Consists of letters from patrons and associations pertaining to the museum services, DuMond projects, services to the community, paper presented, Museum collections, the museum centennial, and the operation of the museum. Most valuable in tracing the services of the museum and DuMond's work are incoming and outgoing letters from H.L. Ward, librarian from the Detroit Public Library; Ludlon Bull, Associate Director at the Metropolitan Museum of Art in New York; Michigan National Bank; Uhl, Bryant, Snow & Slawson, Attorneys at Law; Mrs. Glendon A. Richards; Brown & Gregg, Attorneys at Law; P. A. Herbert, Professor of Forestry at Michigan State College; Henry W. Corning, Trustee at the Cleveland Museum of Natural History; Michigan Audubon Society; War Man Power Commission; Rochester Museum of Arts and Sciences; Steve Nisbet; Ada Fuller and Jessie Stevenson; City of Grand Rapids Special Auxiliary Patrol Squad; Messmore Kendall; Ray Cannon; Michigan State College; and Henry Mastens. Arranged chronologically.