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Typed information on back of photograph: Marble Canyon, Colorado River, Utah. 1872. Side view of Major Powell's boat, the Emma Dean. Note: This photo shows clearly the two life preservers attached to sides of Major Powell's chair.

Typed information on back of photograph: Major John Wesley Powell. Photograph taken about 1872.

Left bank of Green River. Boats of Powell's Second Expedition, before the start of the journey. The boats are "Canonita," "Emma Dean," and "Nellie Powell." Just below the Union Pacific Railroad bridge at Green River Station. The famous eleven of the Powell party were Andy Hattan, W. Clement Powell, S.V. Jones, Major John W. Powell, Frederick S.

Green River, about 1/2 mile below Union Pacific Railroad bridge, showing boats soon after they had been run down from unloading at bridge. River flows to the left. 1871. Handwritten notes on back of duplicate photograph: Our Boats, 1871, at Green River, Wyoming.

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.

Major John Wesley Powell's boat the "Emma Dean", Grand Canyon National Park, Arizona. 1871.

Painting by Henry Wood Elliott (1846-1930), Yellowstone Lake, 1871, watercolor (Phoenix Art Museum).  The view is from northern Yellowstone Lake looking to the south.  In the foreground, one can see the Annie in the northern lake and the three largest of the lake’s islands: Stevenson Island, with Frank Island and the smaller Dot

The first camp of Powell's Second Expedition. Shown from left to right are: Professor Almon Harris Thompson, Andrew Hattan, S.V. Jones, John F. Steward, W.C. Powell, Frank C.A. Richardson, Frederick Dellenbaugh, and F.M. Bishop. Green River, Wyoming. May 4, 1871.

Lighthouse Rock in Canyon of Desolation, Green River. The three boats are anchored near shore on left side. Utah. August 11, 1871.