John Muir (2015). “My First Summer in the Sierra (With Original Drawings & Photographs): Adventure Memoirs, Travel Sketches & Wilderness Studies”, p.22, e-artnow
John Muir (1997). “Nature Writings: The Story of My Boyhood and Youth, My First Summer in the Sierra, the Mountains of California, Stickeen, Selected Essays”, p.721, Library of America
John Muir (2015). “A Thousand-Mile Walk to the Gulf (With Original Drawings & Photographs): Adventure Memoirs, Travel Sketches & Wilderness Studies”, p.43, e-artnow