The papers brought together in this volume span a period of twenty-nine years of Muir's life, during which they appeared as letters and articles, for the most part in publications of limited and local circulation. Some of these papers were revised by the author during the later years of his life, and these revisions are a part of the form in which they now appear. The recital of his experiences during a stormy night on the summit of Mount Shasta will take rank among the most thrilling of his records of adventure. His observations on the dead towns of Nevada, and on the Indians gathering their harvest of pine nuts, recall a phase of Western life that has left few traces in American literature. Many, too, will read with pensive interest the author's glowing description of what was one time called the New Northwest. John Muir (1838-1914) was a Scottish-American naturalist, author, environmental philosopher and early advocate of preservation of wilderness in the United States. His letters, essays, and books telling of his adventures in nature, especially in the Sierra Nevada mountains of California, have been read by millions. His activism helped to preserve the Yosemite Valley, Sequoia National Park and other wilderness areas. The Sierra Club, which he founded, is a prominent American conservation organization.