Change came quickly in Santa Barbara following the American Conquest of California. The population doubled between 1850 and 1860. In 1851, land surveyor Salisbury Haley designed the street grid, famously botching the block measurements, misaligning the streets, thereby creating doglegs at certain intersections. Wood construction replaced adobe as American settlers moved in; during the Gold Rush years and following, the town became a haven for bandits and gamblers, and a dangerous and lawless place. Charismatic gambler and highwayman Jack Powers had virtual control of the town in the early 1850s, until driven out by a posse organized in San Luis Obispo. English gradually supplanted Spanish as the language of daily life, becoming the language of official record in 1870. The first newspaper, the "Santa Barbara Gazette", was founded in 1855.