US Geological Survey Bench Mark at Taft Point in Yosemite National Park. It gives the elevation as 7503 feet and was placed there on 10-1-1906. Image taken with a Nikon D3 camera and 24-70 mm f/2.8 lens (ISO 400, 70 mm, f/11, 1/80 sec).
There is a story "Yosemite Trails" written in 1911 by J. Smeaton Chase that references this bench mark. http://www.yosemite.ca.us/library/yosemite_trails/fort_monroe_to_little_yosemite.html