A formal portrait of Walter Clem Powell, nephew of John Wesley Powell and member of  Powell's second expedition. Circa 1870. USGS Grand Canyon National Park Museum Collection, P.O. Box  129, Grand Canyon, AZ 86023
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<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/grand_canyon_nps/4686937354/">17264 Grand Canyon Powell Expedition 1873</a>