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- All Subjects: Hayden, Carl Trumbull, 1877-1972
- Creators: Cameron, Ralph H.
- Creators: Moran, P. J.
- Creators: Dickinson, Alf
- Member of: 100 Years of Grand: The Grand Canyon Centennial Project
Letter from Ralph H. Cameron to Carl Hayden thanking him for forwarding Senate Bill No. 390 with the report of March 31st, 1918, and expressing interest in their upcoming meeting in Washington.
Letter from Ralph H. Cameron to Carl Hayden requesting a delay on the introduction of the Grand Canyon bill until he can meet with himself and Senator Ashurst in Washington.
Letter from Ralph H. Cameron asking to speak to Carl Hayden concerning a matter relevant to the bill granting National Park status to the Grand Canyon.
Letter from P. J. Moran to Carl T. Hayden inquiring when construction will begin on the approach road to Bright Angel Trail.
Letter from Alf Dickenson to Carl T. Hayden about securing mining permits within the park.
Letter from P. J. Moran to Carl T. Hayden inquiring when construction will begin on the approach road to Bright Angel Trail.