Indian Linguistic Families Of America, North Of Mexico: Seventh Annual Report of the Bureau of Ethnology to the: Secretary of the Smithsonian Institution, 1885-1886,: Government Printing Office, Washington, 1891, pages 1-142

John Wesley Powell was a U.S. soldier, geologist, explorer of the American West, and director of major scientific and cultural institutions. He is famous for the 1869 Powell Geographic Expedition, a three-month river trip down the Green and Colorado rivers that included the first passage of European Americans through the Grand Canyon.