Letter from E. C. Finney to Carl Hayden regarding the cost of the Bright Angel Trail and an improved road between the town of Maine and the Grand Canyon.

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.

Typescript report, black and white, describing the birds of Grand Canyon National Park with cover drawing of a bald eagle.

Typescript report, black and white, describing the mammals of Grand Canyon National Park with cover drawing of a bighorn sheep.

Photograph of plaster molds used during the ceramic bell-making process at Cosanti in Paradise Valley, Arizona

Photograph of a lost styrofoam casting at Cosanti in Paradise Valley, Arizona

Photograph of Earth House, designed by Paolo Soleri in 1956, at Cosanti in Paradise Valley, Arizona

Interior photograph of Cat-Cast House at Cosanti in Paradise Valley, Arizona

Interior photograph of Ceramics Studio, designed by Paolo Soleri in 1959, at Cosanti in Paradise Valley, Arizona

Photograph of swimming pool and Cat-Cast House (built 1965-1966) at Cosanti in Paradise Valley, Arizona