John Wesley Powell's 2nd Expedition Down the Colorado

In 1871, John Wesley Powell appointed seventeen year-old Frederick Samuel Dellenbaugh as artist and assistant topographer for his second expedition down the Colorado River. Over 800 digital images have been selected at Yale's Beinecke Library from nearly 900 photographic prints, relief halftones, postcards, negatives, tintypes and pen and ink drawings in Dellenbaugh’s personal collection. Enjoy.