"Understanding writers, down to the letter / How do authors think? Interviews get behind the words to the creative process" by Steve Weinberg, www.sfgate.com. September 11, 2005.
John Muir (2015). “JOHN MUIR’S CALIFORNIA COLLECTION: My First Summer in the Sierra, Picturesque California, The Mountains of California, The Yosemite & Our National Parks (Illustrated): Adventure Memoirs, Travel Sketches, Nature Writings and Wilderness Essays”, p.391, e-artnow