In previous winters when Clarence King and James Gardner finished their work in the Nevada desert and hoarded a river boat for San Francisco, they were the center of the attention of the other passengers. Clarence King was the director of a geological survey of the land along the new transcontinental railroad, and Gardner was his first assistant. They were trying to discover what minerals could he found out in the desert waste, what crops could he grown, and how much water was available. But in October, 1872, when rains and high winds stopped the survey’s work again and King and Gardner once again headed for winter quarters, none of the other passengers paid any attention to them at all. The passengers were talking about something that thrilled every Californian. Somewhere out in the American Desert, two prospectors had stumbled across a whole mountain of diamonds.