Letter from George Otis Smith to Carl Hayden regarding mining rights in the Grand Canyon.

Letter from George Otis Smith, U.S. Geological Survey to Carl Hayden regarding asbestos mining prospects in the Grand Canyon.

Letter from J. R. Eakin to Stephen T. Mather about expenses and reconstruction of the Kaibab Trail.

Letter from J. R. Eakin to Carl T. Hayden concerning access to Rowe Well and the canyon.

Letter from J. R. Eakin to Carl Hayden justifying the value of his land at twenty-five thousand dollars.

Letter from J. R. Eakin to Carl Hayden regarding the sale of Bass properties to the Santa Fe Railroad Company.