The Mentor: The Yosemite Valley, Vol 4, Num. 16, Serial No. 116, October 2, 1916

Published in 1916, 'The Mentor: The Yosemite Valley' by Dwight L. Elmendorf is a travel guide that explores the natural beauty and historical significance of Yosemite Valley. The text details its iconic features, such as El Capitan and Half Dome, while providing insights into the area's geological history and vibrant ecosystem. Elmendorf's vivid descriptions and practical information make it a valuable resource for nature enthusiasts and travelers interested in the preservation of this national treasure.