John K. Hillers 1875 Logs [Boulder Creek] [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. 147]
Stereoview Library of Congress, Prints and Photographs Division Reproduction Number: LC-DIG-stereo-1s00893 (digital file from original photo, front) LC-DIG-stereo-2s00893 (digital file from original photo, back) LC-USZ62-60033 (b&w film copy neg. of half stereo)
