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- All Subjects: Cosanti Foundation (Scottsdale, Ariz.)
- All Subjects: Grand Canyon (Ariz.)
Letter from Gifford Pinchot to John H. Page denying his request to build a railway on the rim of the Grand Canyon for the Canyon Copper Company.
Letter from John H. Page to Carl T. Hayden regarding his company's rights to build a railway if they choose to.
Letter to Carl T. Hayden regarding a water-power bill in effect for the Grand Canyon.
Letter from Henry Graves to Carl T. Hayden regarding the land ownership and grazing rights of the Havasupai.
Letter from John Page to Carl T. Hayden regarding a conversation conducted at Hotel Adams in Phoenix. Page states his concern over the national park bill in reference to his mining company.
Letter from Bernie Zachau to Carl Hayden regarding water power in the Grand Canyon.
Letter from Carl Hayden to Joseph J. Cotter regarding suggestions on the proposed national park bill.
Letter from Joseph J. Cotter to Carl Hayden regarding the use of water power and summer homes in the proposed park boundaries.
Letter from Carl Hayden to Bernie Zachau regarding the national park bill with an enclosed copy of the National Park Service Act.
Letter from Harold Greene to Carl Hayden regarding the proposed boundaries for the national park bill.