George Hearst, born 1820 in Franklin County, Missouri, had little formal education but educated himself in geology and prospecting. His talent for scoping out the "layof the land" paid off in some of the most important mining claims in the United States. The Comstock Lode in Nevada, the Homestake gold mine in South Dakota and the Anaconda copper mine in Montana would become three of the largest mining discoveries in American history. As a rancher and prospector Hearst continually acquired large portions of land throughout the United States, especially in California and the West. In 1863 Hearst married Phoebe Apperson, a teacher from his home state. Moving to San Francisco, Phoebe gave birth to their only child, William Randolph Hearst, in 1863. George purchased the 48,000 acre Piedras Blancas Ranch at San Simeon in 1865, adding the adjoining Santa Rosa and San Simeon ranches later. During his lifetime the ranches were used as a family retreat. In 1873 Phoebe took her young son William on a grand tour of Europe where the two spent more than a year visiting castles, museums, and various cultural centers. This trip would prove to be a pivotal inspiration for William's later endeavor constructing Hearst Castle at San Simeon.