Filtering by
- All Subjects: Hayden, Carl Trumbull, 1877-1972
- Creators: Moran, P. J.
- Creators: Riordan, M. J.
- Creators: Smith, George Otis
- Creators: Dawson, C. D.
Letter from George Otis Smith, U.S. Geological Survey to Carl Hayden regarding asbestos mining prospects in the Grand Canyon.
Letter from George Otis Smith to Carl Hayden regarding mining rights in the Grand Canyon.
Letter from C. D. Dawson to Carl Hayden urging him to consider the rights of miners and farmers when drawing up the boundaries for the proposed park.
Letter from M. J. Riordan to Carl Hayden expressing his opposition to the federal government's takeover of 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.
Letter from Michael J. Reardon to Carl T. Hayden, in agreement with Ralph Cameron, asserting that Bright Angel Trail should not be sold from Coconino County to the United States.