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.

Speech by Carl T. Hayden offering a motion to authorize a road an trail construction program in Grand Canyon National Park "to make these natural wonders accessible to the American people." The speech appears in the Congressional Record, 68th Congress, First Session.

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