The other was the discovery of gold at Sutter’s Mill, with San Francisco the nearest port. Within a year, a thousand people were pouring through that port every week. By 1849, San Francisco’s population had grown to twenty-five thousand. By 1853, fifty thousand. By 1869, one hundred fifty thousand. There was nothing on the West Coast remotely like it. San Francisco in 1869 was twenty-five times the size of Los Angeles. Over the next decade, the West’s four greatest railroad tycoons—Stanford, Hopkins, Huntington, and Crocker—began erecting fabulous residences on top of the commanding California
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