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

Letter of introduction for Dwight B. Heard on the arrival of National Park Service Director Stephen T. Mather to Phoenix. Mather's visit includes trips to Roosevelt Dam and Tumacácori.

Letter from Carl Hayden to L. S. Williams informing the Saginaw and Manistee Lumber Company that a bill extending the timber cutting rights in the Canyon did not pass in Congress.

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 Carl Hayden to W. W. Bass informing him of the favorable opinion towards a national park bill.

Letter from Carl Hayden to W. W. Bass soliciting his opinion on the proposed national park bill.

Letter from Carl Hayden to C. H. Gensler informing him of the proposed Grand Canyon National Park bill.

Letter from Carl Hayden to Ralph H. Cameron responding favorably to a request to meet in regards to the bill granting National Park status to the Grand Canyon.

Establishment of Grand Canyon National Park.