| John K. Hillers The Dripping Rock [Pa ru' nu wip Series.] [U.S. topographical and geological survey of the valley of the Colorado River of the west, by J.W. Powell and A.H. Thompson. No. 014] 1873 Stereoview Library of Congress, Prints and Photographs Division Reproduction Number: LC-DIG-stereo-1s00777 (digital file from original photo, front) LC-DIG-stereo-2s00777 (digital file from original photo, back) LL/109220
| |