Filtering by
- All Subjects: Mining
- All Subjects: Carl T. Hayden Photographs
- All Subjects: Albright, Horace Marden, 1890-1987
- All Subjects: Breen, Fred Sylvester, 1869-1932
- All Subjects: Watchtower at Desert View (Ariz.)
- Member of: 100 Years of Grand: The Grand Canyon Centennial Project
Letter from Fred Breen to Carl Hayden regarding the sale of Bright Angel Trail.
Letter from Carl Hayden to Fred S. Breen regarding Yaki Point, the sale of Bright Angel Trail and the building of a road between Maine and 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 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 A. F. Potter to Carl T. Hayden describing John H. Page's request to build a railway for the Canyon Copper Company as "impractical."
Letter from John H. Page regarding his right to build a railway between Grand Canyon Station and the Canyon Copper Company's mines and hotel.
Letter from Gifford Pinchot to John H. Page denying his request to build a railway on the rim of the Grand Canyon for the Canyon Copper Company.