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 Carl T. Hayden to C. H. Gensler, Havasupai Indian Reservation, regarding Hualapai and Cataract Canyons geography.

Letter from Carl Hayden to George Otis Smith asking his advice regarding the mining of asbestos deposits in the Grand Canyon.

Letter from L. B. Williams to Carl Hayden regarding W. W. Bass' resistance to the park bill.

Letter from Carl Hayden to L. B. Williams concerning the proposed township in the Grand Canyon.

Letter from Carl Hayden to George W. P. Hunt outlining the proposed national park boundaries and the cost of a township if the state of Arizona decided to acquire one on the rim of the Grand Canyon.

Letter from John H. Page to Carl T. Hayden regarding his company's rights to build a railway if they choose to.

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.