Letter from Carl Hayden to W. W. Bass asking his opinion on the proposed boundaries of the National Park. GC Natl Park written on the letter in blue pencil.

Letter from Carl Hayden to W. W. Bass asking his opinion on the proposed boundaries of the National Park. GC National Park written on the letter in red pencil.

Letter from Carl Hayden to Hugh E. Campbell with an enclosed outline map of the proposed boundaries of Grand Canyon National Park.

The great mountain Chomo-lhari (Queen of the Divine Hills) which guards the main gateway into Tibet through the Himalayas. Chomo-lhari is 24,000 feet high.

Letter from François E. Mathes to Carl T. Hayden about maps of the Grand Canyon.