Caughey, John Walton. GOLD IS THE CORNERSTONE. Berkeley/Los Angeles; University of California Press. 1948. 321 pages.
In this book John Caughey tells the story of California’s gold in human-interest terms. He describes the gold discovery in detail, taking plenty of time to set down exactly what happened and to chartactize Marshal and Sutter, the Mormons, and the other participants. He reports the gradual spread of the news throughout the world, comments on the gathering momentum fo the rush, and discusses the early mining methods and tools