books.google.com - When James Marshall found a small, soft shiny stone in a California stream, he knew it could only be one thing: Gold! His cry of discovery would be heard around the world. In the third installment of Don Brown's Actual Times series, Gold! Gold from the American River! is the story of the California gold...https://books.google.com/books/about/Gold_Gold_from_the_American_River.html?id=C50IPNpiL8oC&q=commenced+hammering&utm_source=gb-gplus-shareGold! Gold from the American River!