Speech by Carl T. Hayden offering a motion to authorize a road an trail construction program in Grand Canyon National Park "to make these natural wonders accessible to the American people." The speech appears in the Congressional Record, 68th Congress, First Session.

Amendments to the bill establishing the Grand Canyon a National Monument. Circa 1908.

Letter from L. B. Williams to Carl Hayden regarding W. W. Bass' resistance to the park bill.

Letter from Harry Welch to Carl Hayden enclosing W. W. Bass' letter of protest against the proposed national park bill.

Letter from W. W. Bass to Harry Welch protesting the proposed national park bill.

Letter from Carl Hayden to George W. P. Hunt outlining the proposed national park boundaries and the cost of a township if the state of Arizona decided to acquire one on the rim of the Grand Canyon.

Letter from Stephen T. Mather to Carl Hayden with markup of bill S 390 for the proposed National Park.