Mark Twain
... He started signing all of his articles in 1863 with the term “Mark Twain,” a boatman’s call meaning the river is only two fathoms deep. He continued signing all of his work with Mark Twain for the rest of his career. In 1864, Twain moved to San Francisco to be a reporter. ... In 1866, Twain traveled the world writing reports for New York and California. ... Twain was married to Olivia Langdon in 1870. ... Twain continued to write his novels.