Images

Illustration of Devil’s Slide, Montana (just north of Yellowstone National Park along the Yellowstone River) by artist Thomas Moran for Scribner’s Monthly and based on a description of Nathanial Langford.  The depiction is not particularly accurate, but Moran had a chance to see the feature in person when he accompanied the 1871 Hayden geological expedition to

The first photograph taken of Devil’s Slide, Montana (just north of Yellowstone National Park along the Yellowstone River).  Photo by William Henry Jackson in either 1871 or 1873.

Henry Elliott’s 1871 map of Yellowstone Lake (https://hdylake.org/about/history-of-mapping-yellowstone-lake/). The headwaters of the Snake River, Upper Valley of the Yellowstone River, and Pelican River are shown.

Geologist Ferdinand Hayden at work with a rock hammer.  USGS photo by William Henry Jackson, 1870.

Henry Wood Elliott during a geological expedition in 1870.  Photo by William Henry Jackson.

Undated portrait of Jim Bridger (1804-1881).  Published in Gaston's Portland, Oregon: Its History and Builders, volume 1 (1911), image in the public domain.

William Clark's 1814 map, indicating the route of John Colter during the winter of 1807-1808. (Library of Congress, Geography and Map Division, Washington, D.C.)