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- All Subjects: Map
- All Subjects: Moran, Patrick Joseph, 1864-1936
- All Subjects: Smith, George Otis, 1871-1944
- Member of: 100 Years of Grand: The Grand Canyon Centennial Project
Detailed map of Granite Gorge section of the Grand Canyon from the pamphlet titled, "Titan of Chasms: Grand Canyon of Arizona."
Letter from George Otis Smith to Carl Hayden regarding mining rights 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, U.S. Geological Survey to Carl Hayden regarding asbestos mining prospects in the Grand Canyon.
Letter from Carl T. Hayden to P. J. Moran concerning the alignment of the road to Bright Angel Trail.
Letter from P. J. Moran to Carl T. Hayden inquiring when construction will begin on the approach road to Bright Angel Trail.
Letter from P. J. Moran to Carl T. Hayden inquiring when construction will begin on the approach road to Bright Angel Trail.