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- All Subjects: Bass, William Wallace, 1849-1933
- All Subjects: Mather, Stephen Tyng, 1867-1930
- All Subjects: Geography
- Member of: 100 Years of Grand: The Grand Canyon Centennial Project
Detailed map of Granite Gorge section of the Grand Canyon from the pamphlet titled, "Titan of Chasms: Grand Canyon of Arizona."
Letter from Stephen T. Mather to Carl Hayden with markup of bill S 390 for the proposed National Park.
Letter from W. W. Bass to Harry Welch protesting the proposed national park bill.
Letter from W. W. Bass to Carl Hayden regarding the right to his property.
Letter from Carl T. Hayden to C. H. Gensler, Havasupai Indian Reservation, regarding Hualapai and Cataract Canyons geography.
Letter from Carl Hayden to W. W. Bass on the recent amendments made to the national park bill.
Letter from W. W. Bass to Carl Hayden arguing for a delay in the national park bill proceedings.
Letter to W. W. Bass from Carl Hayden's secretary informing him of a vote on the national park bill will not be held until December.
Letter from W. W. Bass to Carl Hayden opposing the Grand Canyon National Park bill in its current form.
Letter from Franklin K. Lane to Carl T. Hayden expressing his support for bill S.390 in establishing the Grand Canyon as a National Park.