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- All Subjects: Gilbert and Myrtle Campbell Photographs
- All Subjects: Coconino County (Ariz.)
- All Subjects: Automobiles
- All Subjects: Cataract Canyon (Wayne County-San Juan County, Utah)
- All Subjects: Ashurst, Henry Fountain, 1874-1962
- Member of: 100 Years of Grand: The Grand Canyon Centennial Project
- Status: Published
Amendments to the bill establishing the Grand Canyon a National Monument. Circa 1908.
Letter from Carl T. Hayden to C. H. Gensler, Havasupai Indian Reservation, regarding Hualapai and Cataract Canyons geography.
Letter from Harold Greene to Carl Hayden regarding the proposed boundaries for the national park bill.
Letter from attorney Thomas J. Croff to Carl Hayden informing him of the Atchison, Topeka, and Santa Fe railroad company's ownership of land inside the proposed national park boundaries.
Letter from Carl Hayden to Hugh E. Campbell with an enclosed outline map of the proposed boundaries of Grand Canyon National Park.
Letter from Carl Hayden to C. T. Woolfolk thanking him for his support on the proposed bill. Hayden writes that the bill will not be introduced into the current session of Congress as any new legislation would be impossible to pass, but he is optimistic over the bill's future.
Letter from M. J. Riordan to Carl Hayden expressing his opposition to the federal government's takeover of Bright Angel Trail.
Letter from Carl Hayden to M. J. Riordan expressing his support for Coconino County in turning over the Bright Angel Trail to the federal government.
Letter from Horace M. Albright to Carl Hayden requesting a formal submission from Coconino County concerning the Bright Angel Trail.
Letter from Carl Hayden to Stephen Mather regarding Coconino County's willingness to dispose of Bright Angel Trail as long as the funds acquired would go to building a road between Old Trails Highway at Maine to the Grand Canyon.