John Muir Quotes about Fun
John Muir, Edwin Way Teale, Henry Bugbee Kane (2001). “The Wilderness World of John Muir”, p.231, Houghton Mifflin Harcourt
John Muir (2015). “John Muir: The Story of My Boyhood and Youth & Letters to a Friend (Autobiography With Original Drawings): The Memoirs of the Naturalist, Environmental Philosopher and Early Advocate of Preservation of Wilderness, the Author of The Yosemite, Travels in Alaska, The Mountains of California & Steep Trails”, p.73, 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.720, Library of America