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- All Subjects: Grand Canyon National Park (Ariz.)
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Joseph Simons to Carl T. Hayden re: Imperial Valley farmers support for Boulder Canyon Project, May 25, 1926.
Carl T. Hayden to George W. P. Hunt re: Swing-Johnson Bill and three state meeting in Los Angeles, December 11, 1926.
Petition of residents of Graham County, Arizona opposed to the "Swing-Johnson Boulder Canyon Dam Bill," 1/14/1927.
Why I oppose the approval of the Colorado River Compact, by Geo. W.P. Hunt, Governor of Arizona, 1923?
Report of Colorado River Board on the Boulder Canyon Project to the Secretary of the Interior, 11/24/1928.
Detailed map of Granite Gorge section of the Grand Canyon from the pamphlet titled, "Titan of Chasms: Grand Canyon of Arizona."
Amendments to the bill establishing the Grand Canyon a National Monument. Circa 1908.
Editoral attacking Senator Ralph Cameron for attempting to buy Bright Angel Trail.
Travel statistics for Grand Canyon National Park.
Rebuttal to the editoral published in the Coconino Sun attacking Ralph Cameron.