Black and white, silver gelatin print with some silvering. Circa 1930.

Black and white, silver gelatin print with some silvering. Circa 1930.

Black and white, silver gelatin print with some silvering. Circa 1930.

Black and white, silver gelatin print with some silvering. Circa 1930.

Proposed admission fees to Grand Canyon National Park.

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

Letter from Arno B. Cammerer to J. R. Eakin describing the procedure for purchasing Bright Angel Trail.

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 Carl T. Hayden to Fred S. Breen concerning the expenditure of $100,000 to purchase Bright Angel Trail.