Exploration of the Colorado River of the West and its tributaries. Explored in 1869, 1870, 1871, and 1872, under the direction of the secretary of the Smithsonian institution
Smithsonian Institution; Powell, John Wesley, 1834-1902; Thompson, A. H. (Almon Harris), 1839-1906; Coues, Elliott, 1842-1899; Goode, G. Brown (George Brown), 1851-1896