Although he is best known by his pen name, Mark Twain's birth name is Samuel A Langhorne Clemens. Mark Twain was born in 1835, just after Halley's Comet, a short- B period comet visible from Earth every seventy-five years, was visible in the sky. Twain grew up on the banks of the Mississippi River in Hannibal, Missouri. His childhood C adventures with his friend's along the Mississippi River served as inspiration for his D novels, The Adventures of Tom Sawyer and The Adventures of Huckleberry Finn. One vear before his death, Twain said, "I came in with Halley's Comet in 1835. It is coming again next year (1910), and I expect to go out with it. It will be the greatest disappointment of my life if I don't go out with Halley's Comet." Just as he predicted, Twain died of a heart attack in 1910, just one day after the comet appeared in the night sky.