Twain, Mark (pen name of Samuel Clemens) (1835-1910) - American humorist
whose pseudonym was adopted from his days as a Mississippi steamboat pilot,
"mark twain" meaning "two fathoms deep." He introduced colloquial speech
into American writing and was the most popular writer of his time.
Life on the Mississippi (1883) - An autobiographical account of Twain's
early days as a steamboat pilot on the Mississippi River. The second half
of the book deals with his return to the river in 1882.
