John Muir (1838–1914), Scottish-born American naturalist, was one of the most influential conservationists and nature writers in American history. Founder of the Sierra Club and its president until his death, he was instrumental in helping to save wilderness areas, including Yosemite Valley and Sequoia National Park. He was a spirit so free that all he did to prepare for an expedition was to “throw some tea and bread into an old sack and jump the back fence.”
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John Muir’s adventure guide for the Yosemite Valley.