He worked there from 1862 to 1864, writing humorous sketches and reports under the pseudonym "Mark Twain". This experience proved crucial in developing his writing style and establishing his comedic voice.
He also wrote for:
* The *San Francisco Morning Call*
* The *Sacramento Union*
* The *New York Tribune*
* The *New York World*
These newspapers gave him valuable experience and helped him gain recognition as a writer before he achieved national fame.