The mouth of Kanab Creek. The beds of the Colorado River and its tributary here lie in gorges cut by the running water to the depth of about 3.500 feet below the general surgace of the country. The highest point seen in the picture is 2.500 feet above the water, and the walls are here too steep to be scaled, No. 10 from the series "Geographical Explorations and Surveys West of the 100th Meridian"