. . . . . . . . . . . . . . . . . . . . . "Annual report of Captain A.A. Humphreys, topographical engineer, in charge of Office of Explorations and Surveys, War Department, December, 1858"@en . . . "Colorado River (Colo.-Mexico)" . . "Nebraska" . . "West (U.S.)" . . "Colorado Exploring Expedition." . . "Pecos River." . . . .