A Canyon Voyage: The Story of John Wesley Powell and the Charting of the Grand Canyon

In 1871, seventeen-year-old Frederick Dellenbaugh began a great adventure when he joined Major John Wesley Powell and a crew of scientists on Powell's second exploration trip down the Colorado River and into the Grand Canyon. These were the last great stretches of land and river still unknown in the continental United States. Powell, Dellenbaugh, and the rest of the group spent years exploring the Grand Canyon country, noting its geologic features, and observing its Native Americans inhabit...