 Complete the following phrase:  In 1846, the first cargo boat ascended the San Joaquin River. In 1848, John Doak established the first ferry service on the river, and the first freight vessel, the sloop Maria, visited Stockton. In 1849, Doak brought lumber from San Francisco to Stockton and began a lumber business. By the 1850s, the port had become a center of commodity shipping and the supply center for the 