DeWitt Clinton Thompson arrived in San Francisco on the steamer California in 1849. He was in real estate and business, and
became a city official in San Francisco. He was one of the founders of the State Agricultural Society, in 1854. In 1865 he
organized the National Insurance Company; in 1868, the California Trust Company, and in 1876, the Bank of Commerce. He was
appointed Major General of California in 1874. He died at his home in Santa Rosa on May 13, 1919.