This is just one of many letters and personal papers from the estate of Yellowstone National Park's first Naturalist, Milton P. Skinner. Each is authentic...measures about 8 1/2" x 11" James Grinnell 1877-1939 Editor Condor Magazine, Museum Director UC Berkeley, teacher, Yosemite 1914 Survey, Etc...1932 Letter~JOSEPH GRINNELL~Legendary CALIFORNIA Naturalist CONDOR Editor MUSEUM