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- All Subjects: South Kaibab Trail (Ariz.)
- All Subjects: Flora and fauna
- All Subjects: Hopi Tribe of Arizona
- All Subjects: Geography
- Member of: 100 Years of Grand: The Grand Canyon Centennial Project
Map of proposed addition to Grand Canyon National Park Boundaries. Circa 1932.
Handwritten cover titled, "Nature Notes of Grand Canyon, Polyphemus Moth, Female, Found at Grand Canyon, 5 July 1928, Vol. 3 - No. 2." Cover includes a drawing of the moth.
Typescript report, black and white, describing the birds of Grand Canyon National Park with cover drawing of a bald eagle.
Black and white print of people riding mules down a trail. Circa 1940-1949.
Press release on the increase in wildlife in the Grand Canyon including mountain sheep, deer, and the Abert Squirrel.
Letter from Fred Harvey to Senator Carl Hayden on the diary of Padre Francisco Garcés and his entry on July 4, 1776.
Letter from Fred Harvey to Senator Carl Hayden on the diary of Padre Francisco Garcés and the lack of knowledge of U.S. citizens regarding the Hopi people.
Letter from Carl T. Hayden to C. H. Gensler, Havasupai Indian Reservation, regarding Hualapai and Cataract Canyons geography.