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Bower Cave Yosemite NYPL bGF B. en Bower Cave Yosemite nypl org Scan by NYPL Bower Cave Yosemite Stairways Caves Walkways The Miriam and Ira Wallach Division of Art Prints and Photographs Photography Collection aacfdabc GFB Robert Dennis collection of stereoscopic views deadeeaa NYPGF repo nypl org File Bower Cave Yosemite