Letter from Carl Hayden to W. W. Bass asking his opinion on the proposed boundaries of the National Park. GC Natl Park written on the letter in blue pencil.

Letter from Carl Hayden to W. W. Bass asking his opinion on the proposed boundaries of the National Park. GC National Park written on the letter in red pencil.

Letter from Carl Hayden to Hugh E. Campbell with an enclosed outline map of the proposed boundaries of Grand Canyon National Park.

Photograph of Ceramics Studio showing roof structure and skylight at Cosanti in Paradise Valley, Arizona

Interior photograph of Ceramics Studio at Cosanti in Paradise Valley, Arizona showing original skylight

Interior photograph showing skylight and ceiling structure at Gallery/North Studio at Cosanti in Paradise Valley, Arizona

Photograph of inscriptions on a retaining wall at Cosanti in Paradise Valley, Arizona

Photograph of inscriptions on a retaining wall at Cosanti in Paradise Valley, Arizona

Photograph of inscriptions on a retaining wall at Cosanti in Paradise Valley, Arizona

Interior photograph of Gallery/North Studio at Cosanti in Paradise Valley, Arizona showing skylight and ceiling structure