5.17 Shoshone Canyon and Falls on the Snake River in Idaho, with a survey team member at work on a rock in the foreground. Photographed by Timothy O'Sullivan in 1868, while accompanying the U. S. Geological Exploration of the Fortieth Parallel under the direction of Clarence King, who in 1879 was named the first director of the United States Geological Survey.

(National Archives [577-KS-4412])