Powell's second expedition ready to start from just below Union Pacific Railway Bridge at Green River Station, Wyoming, 1871 [Left to Right: Canonita (boat) - E.O. Beaman, Andy Hattan, Walter Clement 'Clem' Powell; Emma Dean (boat) - Stephen Vandiver Jones, John K. 'Jack' Hillers, Major John Wesley Powell, Frederick S. Dellenbaugh; Nellie Powell (boat) - Almon Harris Thompson, John F. Steward, Francis Marion Bishop, Frank Richardson].
This collection is for reference purposes only. Requests to use images in non-profit and commercial endeavors should be made to the United States Geological Survey Photographic Library in Denver, Colorado.
U.S. Govt. Print. Off., The Colorado River Region and John Wesley Powell. A collection of papers honoring Powell on the 100th anniversary of his exploration of the Colorado River, 1869-1969 Washington, 1969