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- All Subjects: Grand Canyon National Park (Ariz.)
- Creators: Demaray, A. E.
- Creators: Gavin, J. E.
- Creators: United States Geological Survey
- Creators: Heard, Dwight
Letter from A. E. Demaray to Carl Hayden regarding the storage of dynamite in Shoski Canyon.
Letter from J. E. Gavin to Louis C. Cramton regarding the Bright Angel Trail controversy, including newspaper clipping.
Letter from A. E. Demaray to Carl Hayden informing him that the Secretary of the Interior will not reimburse Roy James and M. J. Hanley.
Letter from J. E. Gavin to Jesse L. Boyce regarding the TNT storage in the Grand Canyon. Gavin states that although acting director Arno B. Cammerer is confident in Superintendent Crosby's report concerning the legitimacy of the storage, he will continue to investigate the matter to ensure public safety.
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 J. E. Gavin on behalf of Carl Hayden writing in regards to the insurance claims filed with the National Park.
Letter from A. E. Demaray to Carl Hayden with Superintendent Tillotson's report on the road between Grand Canyon Village and Rowe's Well.
Geological examination of the park canyonland, with description of the rocks, water sculping process, volcanic cones and outflows, and land erosion. This edition is Volume 2, 1977 reprint, of the author's 1882 monograph. Includes 12 color maps, 10 color views and is number 280/1500.