Letter from Carl T. Hayden to Michael J. Riordan explaining the benefits of selling Bright Angel Trail and building an approach road.

Letter from Michael J. Reardon to Carl T. Hayden, in agreement with Ralph Cameron, asserting that Bright Angel Trail should not be sold from Coconino County to the United States.

Man sitting on roof of Student Apse with view of pool at Cosanti in Paradise Valley, Arizona

Photograph showing south exterior view of Barrel Vaults at Cosanti in Paradise Valley, Arizona

Photograph showing aerial view of Cosanti and surrounding site in Paradise Valley, Arizona

Photograph of the Bell Tree with bronze bell windchimes at Cosanti in Paradise Valley, Arizona

Photograph of Foundry Apse under construction (1960s) at Cosanti in Paradise Valley, Arizona

Photograph showing silt-cast wall panel at the south end of Cat-Cast House at Cosanti in Paradise Valley, Arizona

Photograph showing a sculpture entitled "Il Donnone," designed by Paolo Soleri, under construction at Cosanti in Paradise Valley, Arizona

Photograph of a silt-cast pond that sat outside of Soleri's house at Cosanti in Paradise Valley, Arizona