Carleton E. Watkins 1860-1865 (taken, later print) Mirror view of El Capitan, Yosemite Valley, Mariposa county, Cal. [Watkins' Pacific Coast - Photographic views of California, Oregon, and the Pacific coast.]
Stereoview Library of Congress, Prints and Photographs Division Reproduction Number: LC-DIG-stereo-1s00440 (digital file from original photo, front) LC-DIG-stereo-2s00440 (digital file from original photo, back)
