Letter of introduction for Dwight B. Heard on the arrival of National Park Service Director Stephen T. Mather to Phoenix. Mather's visit includes trips to Roosevelt Dam and Tumacácori.

Black and white print of people riding mules down a steep trail. Circa 1940-1949.

Black and white print overlooking the canyon with clouds below the canyon's highest elevations. Circa 1940-1949.

Black and white print of man and woman sitting at an overlook.

Sepia stereo card of a man sitting on a rock with printed annotation, "(12) Down the Granite Gorge of the Colorado (1,200 feet deep) from Peritese Point, Grand Canyon of Arizona. Copyright 1903 by Underwood & Underwood."

Black and white print of the south rim from Tuweep.

Black and white print of people riding mules down a trail. Circa 1940-1949.