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.
The Innocents Abroad, or, The New Pilgrim's Progress (1869) - The most
famous travel book of its era, based on a series of letters Twain wrote to
newspapers in the U.S. while travelling to Europe aboard the "Quaker City."
