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- All Subjects: Roosevelt, Theodore, 1858-1919
- All Subjects: Flora and fauna
- All Subjects: Mather, Stephen Tyng, 1867-1931
- Member of: 100 Years of Grand: The Grand Canyon Centennial Project
Press release on the increase in wildlife in the Grand Canyon including mountain sheep, deer, and the Abert Squirrel.
Letter from Carl Hayden to Stephen Mather requesting that congress pay W. W. Bass the sum of twenty-five thousand dollars for his properties.
Letter from Mrs. B. F. Gavin to Stephen Mather regarding the sale of Bass properties to the Santa Fe Railroad Company.
Letter from Stephen Mather to Carl Hayden regarding the sale of Bass properties to the Santa Fe Railroad Company.
Letter from Carl Hayden to Stephen Mather regarding the sale of Bass properties to the Santa Fe Railroad Company.
Typescript report, black and white, describing the mammals of Grand Canyon National Park with cover drawing of a bighorn sheep.
Typescript report, black and white, describing the birds of Grand Canyon National Park with cover drawing of a bald eagle.