Letter from Carl Hayden to Stephen Mather regarding Coconino County's willingness to dispose of Bright Angel Trail as long as the funds acquired would go to building a road between Old Trails Highway at Maine to the Grand Canyon.

Letter from Carl Hayden to M. J. Riordan expressing his support for Coconino County in turning over the Bright Angel Trail to the federal government.

Letter from Carl Hayden to Walter Mitchell on building a Union Chapel in the Grand Canyon.

Letter from Carl Hayden to Robert Fechner on building a Union Chapel in the Grand Canyon.