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- All Subjects: Roosevelt, Theodore, 1858-1919
- All Subjects: Hunt, George Wylie Paul, 1859-1934
- All Subjects: Chapels
- All Subjects: Kolb Bros.
- All Subjects: Smith, George Otis, 1871-1944
- Member of: 100 Years of Grand: The Grand Canyon Centennial Project
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 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 Governor George W. P. Hunt to Calvin Coolidge arguing for more autonomy in Arizona state matters.
Letter from Carl Hayden to Robert Fechner on building a Union Chapel in the Grand Canyon.
Letter from Robert Fechner to Carl Hayden on building a Union Chapel in the Grand Canyon.
Letter from Arno B. Cammerer to Carl Hayden on building a Union Chapel in the Grand Canyon.
Letter from Carl Hayden to Walter Mitchell on building a Union Chapel in the Grand Canyon.