Letter from Carl Hayden to H. F. Robinson with attached notes from W. W. Bass and C. H. Gensler. Hayden solitices advice concerning the Havasupai Tribe needs for grazing and access to natural resources.

Letter from Harold Greene to Carl Hayden regarding the proposed boundaries for the national park bill.

Letter from Henry Graves to Carl T. Hayden regarding the land ownership and grazing rights of the Havasupai.

Letter from Carl T. Hayden to C. H. Gensler, Havasupai Indian Reservation, regarding Hualapai and Cataract Canyons geography.

Letter from C. H. Gensler, Havasupai Agency to Carl Hayden regarding boundary lines.