Cleveland Museum of Art - Ingalls Library
University of Michigan Libraries
Arranges for meeting at his studio
Smithsonian Libraries
Correspondents include Jan Smuts, Hamilton-Stevenson, Ernest Thompson Seton, George Eastman, Henry Cabot Lodge, Lowell Thomas, Edsel Ford, Harold Ickes, Gifford Pinchot, Hamlin Garland, and Vilhjalmur Stefansson, among others
Brooklyn Museum
Metropolitan Museum of Art - Watson Library
The folder may include clippings, announcements, small exhibition catalogs, and other ephemeral items
American Museum of Natural History