In 1863, the San Francisco and San Jose Rail Road had built the railroad from San Francisco to as far as Mayfield (now California Avenue station in Palo Alto) and started running trains to the area. They named a nearby station "Menlo Park" after the sign. The 1867 station building still stands on the platform of the current Caltrain station, used by the local Chamber of Commerce. It holds the record as the oldest, continually operating train station in California. The town of Menlo Park grew up around this station, becoming a popular home for San Francisco businessmen. A post office was established in 1870, and the city was incorporated in 1874 (it dissolved after two years, but later was permanently incorporated in 1927). The original arch, which gave its name to the stations and ultimately, the city, survived until 1922, when the original arch was destroyed in an automobile accident. The origin of the name of Menlo Park, California ("circa" 1850) antedates any work done by Thomas Edison ("circa" 1876) in Menlo Park, New Jersey; Menlo Park, New Jersey, was named after Menlo Park, California.