Muir, John. 1894. The mountains of California. Many editions available, from various publishers. Available, courtesy of the Sierra Club, at http://yosemite.ca.us/john_muir_exhibit/writings/the_mountains_of_california/index.html.
Also see his 1909 volume, "Our National Parks," and "The Yosemite," published 1912. Each of these contains a chapter on conifers found in the magnificent forests of the Sierra Nevada, and each draws heavily (often verbatim) on the descriptions found in "The Mountains of California." "The Yosemite" and "Our National Parks" each provide an additional chapter devoted to Sequoiadendron giganteum.