He got a job as a printer and occasional writer and editor at the Hannibal Western Union, a little newspaper owned by his brother, Orion at the age of 15.
When he was 21
He began learning the art of piloting a steamboat on the Mississippi at the age of 21.
Twain became a fully licensed steamboat pilot until the beginning of the Civil War.
Joined the Confederate Army but didn't want to stay for long, so he left.
Moving to California
He climbed on-board a stagecoach and headed for Nevada and California, where he would live for the next five years.
He adopted the nickname “Mark Twain,” which is a riverboat term meaning “two fathoms deep".
"The Celebrated Jumping Frog of Calaveras County" was published in the Saturday press, which won Twain the fame in the East that he had wanted for so long.
He got a big break, when one of his tales about life in a mining camp, "Jim Smiley and His Jumping Frog," was printed in newspapers and magazines around the country
Twain married Olivia Langdon
Twain published A Connecticut Yankee in King Arthur's Court, a science-fiction/historical novel about ancient England.
When his publishing company failed , Twain was forced to set out on a worldwide lecture tour to earn money.
His favorite daughter, Susy, died at the age of 24 of spinal meningitis.
Twain's wife died from an illness that she had had for many years.
April 21, 1910
Mark Twain died at his country home in Redding, Connecticut. He was buried in Elmira, New York.
Twain was flat broke and had no regular job to give him money.
Twain's writings turned toward social criticism. He and Hartford Courant publisher Charles Dudley Warner co-wrote The Gilded Age, a novel that attacked political corruption, big business and the American obsession with getting rich.
Wrote the Adventures of Tom Sawyer
Twain wrote The Prince and the Pauper
Wrote sequel to The Adventures of Tom Sawyer which was The Adventures of Huckleberry Finn