, which described the second Powell expedition, in 1908. He died in New York City on January 29, 1935. Over 800 digital images shown selected from nearly 900 photographic prints, relief halftones, postcards, negatives, tintypes and pen and ink drawings in Dellenbaugh’s personal collection. Depicting the Colorado River region and other areas of the West, these photographs include works by E. O. Beaman, James Fennemore, and John K. Hillers, photographers on the 1871 Powell expedition, as well as halftone prints of their images, apparently created for inclusion in Dellenbaugh's books. Photographs by Dellenbaugh and other amateur photographers are accompanied by images from professional photographers William Henry Jackson and the Kolb Brothers.