Detailed map of Granite Gorge section of the Grand Canyon from the pamphlet titled, "Titan of Chasms: Grand Canyon of Arizona."

Letter from Stephen T. Mather to Carl Hayden with markup of bill S 390 for the proposed National Park.

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 the Director of the National Park Service, Stephen T. Mather, to Jesse L. Boyce informing him that immediate action is being taken to remove the TNT from the Grand Canyon.

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 from J. E. Gavin on behalf of Carl Hayden writing in regards to the insurance claims filed with the National Park.

Letter from Arthur E. Demaray to Carl Hayden regarding insurance claims submitted by three men who lost property due to a fire in government-owned apartments.

Letter from solicitor Frederic L. Kirgis on behalf of his clients filing claims in regards to the fire started on government-owned apartments in the Grand Canyon.

Letter from Carl Hayden to Arno Cammerer asking his advice in regards to the insurance claims filed by park employees.

Letter from Carl Hayden to Roy James and M. J. Hanley expressing a wish to soon have a definite answer in regards to their insurance claims.