This book details the story of the great migration that was destined to revolutionize the history of California. Owen C. Cox has utilized both published and previously unpublished primary sources, including diaries, journals, and other materials housed in the Bancroft Library, the California State Library, the Los Angeles Public Library, and the University of Southern California Library, among others, to present a contemporaneous account of the Great Trek westward. Includes fifteen full-page illustrations by Franz Geritz, plus three maps, a bibliography, and index.