Entitled: "The Grisly Giant, Mariposa Grove, Yosemite" photographed by Carleton E. Watkins, 1861. The thirty mammoth plate (22 x 18 inches) and one hundred stereo views that Watkins took in Yosemite in 1861 were among the first photographs of the valley sent back East. Oliver Wendell Holmes and Ralph Waldo Emerson received copies, and in 1862 the photographs excited further interest when they were exhibited at Goupil's New York gallery. It was partly on their evidence that President Lincoln signed a bill in 1864 declaring the valley inviolate and leading the way to the National Parks system. The giant sequoia tree in Watkins's photograph is 86 feet in circumference, 225 feet high, and some 3000 years old. Grizzly Giant, as the tree is known, helped clinch the notion that Yosemite was a relict of Eden in North America. The tree has been measured many times, most recently in 1990 by Wendell Flint. It has a volume of 34,005 cubic feet, making it the 25th largest giant sequoia living today.