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- All Subjects: Roads
- All Subjects: Dynamite
- All Subjects: Mining
- All Subjects: Havasupai Tribe of the Havasupai Reservation, Arizona
- All Subjects: Boyce, Jesse Lawrence, 1881-1961
- All Subjects: Parks
- Member of: 100 Years of Grand: The Grand Canyon Centennial Project
Letter from Ed Hamilton to Carl Hayden regarding the storage of dynamite in Shoski Canyon.
Letter from A. E. Demaray to Carl Hayden regarding the storage of dynamite in Shoski Canyon.
Letter from Arno B. Cammerer to Carl Hayden regarding the storage of dynamite in Shoski Canyon.
Letter from R.P Gilliland to Carl Hayden regarding the sale of Bright Angel Trail (Ariz.) and construction of the President's Highway from Maine, AZ, to the Grand Canyon.
Letter from Carl Hayden to R.P Gilliland regarding the sale of Bright Angel Trail (Ariz.) and construction of the President's Highway from Maine, AZ to the Grand Canyon.
Letter from Carl Hayden to Fred S. Breen regarding Yaki Point, the sale of Bright Angel Trail and the building of a road between Maine and the Grand Canyon.
Letter from Alexander Vogelsang to Homer P. Snyder regarding land allocation for the Havasupai Tribe.
Letter from C. H. Gensler, Havasupai Agency to Carl Hayden regarding boundary lines.
Letter from Carl T. Hayden to C. H. Gensler, Havasupai Indian Reservation, regarding Hualapai and Cataract Canyons geography.