Filtering by
- All Subjects: Grand Canyon National Park (Ariz.)
- All Subjects: Grand Canyon (Ariz.)
- All Subjects: Nicaraguan Poets
Letter from George Otis Smith, U.S. Geological Survey to Carl Hayden regarding asbestos mining prospects in the Grand Canyon.
Letter from Carl Hayden to George Otis Smith asking his advice regarding the mining of asbestos deposits in the Grand Canyon.
Letter from George Otis Smith to Carl Hayden regarding mining rights in the Grand Canyon.
Letter from L. B. Williams to Carl Hayden regarding W. W. Bass' resistance to the park bill.
Letter from Carl Hayden to L. B. Williams concerning the proposed township in the Grand Canyon.
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.
Letter from A. F. Potter to Carl T. Hayden describing John H. Page's request to build a railway for the Canyon Copper Company as "impractical."