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- All Subjects: South Kaibab Trail (Ariz.)
- All Subjects: Flora and fauna
- All Subjects: Agriculture
- All Subjects: Fred Harvey (firm)
- Member of: 100 Years of Grand: The Grand Canyon Centennial Project
Letter from Carl Hayden to Stephen Mather regarding the sale of Bass properties to the Santa Fe Railroad Company.
Letter from Carl Hayden to W. W. Bass congratulating him on his good business judgement.
Letter from W. W. Bass to Carl Hayden requesting the boundaries of the park be reconsidered as a large portion of the land is suitable for mining and farming.
Letter from Carl Hayden to W. W. Bass concerning the passing of the national park bill. Hayden states that he will try to make the bill as advantageous to Arizona miners and farmers as possible, but the land will either remain as a national monument or become a national park. A postscript is added concerning the land allocated for the Havasupai Tribe.
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.