Letter from Carl Hayden to Stephen Mather regarding Coconino County's willingness to dispose of Bright Angel Trail as long as the funds acquired would go to building a road between Old Trails Highway at Maine to the Grand Canyon.

Letter of introduction for Dwight B. Heard on the arrival of National Park Service Director Stephen T. Mather to Phoenix. Mather's visit includes trips to Roosevelt Dam and Tumacácori.

Letter from Carl Hayden to Stephen T. Mather regarding certain amendments to the national park bill. Rights regarding the Havasupai Tribe are mentioned.

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 Stephen Mather regarding the sale of Bass properties.

Letter from Carl T. Hayden to Alf Dickenson about mine locations within the park.

Letter from Carl T. Hayden to Louis C. Cramton about potential prosecution of people with mining claims within park boundaries.

Four letters of correspondence about the purchase of Bright Angel Trail between A. E. Demaray, Acting Director of the Grand Canyon National Park; E. C. Finney, Department of the Interior First Assistant Secretary; Carl T. Hayden, Representative (AZ); and Stephen T. Mather, Director of the National Park Service.

Letter from Arno B. Cammerer to Carl Hayden regarding the storage of dynamite in Shoski Canyon.