Samuel Langhorne Clemens (November 30, 1835 – April 21, 1910), known by his pen name Mark Twain, was an American writer, humorist, entrepreneur, publisher, and lecturer. He was lauded as the "greatest humorist this country has produced", and William Faulkner called him "the father of American literature". His novels include The Adventures of Tom Sawyer (1876) and its sequel, the Adventures of Huckleberry Finn (1884), the latter often called "The Great American Novel".
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El Tornillo walks the streets of Melo. People in town think he's crazy. He carries a mirror in his hand and he looks at himself with furrowed brow. He doesn't take his eyes off the mirror. "What are you doing, Tornillo?" "I'm here," he says, "keeping watch on the enemy.