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

Letter from Governor George W. P. Hunt to Carl Hayden expressing his support for legislation that would grant National Park status to the Grand Canyon.

Geological examination of the park canyonland, with description of the rocks, water sculping process, volcanic cones and outflows, and land erosion. This edition is Volume 2, 1977 reprint, of the author's 1882 monograph. Includes 12 color maps, 10 color views and is number 280/1500.