O. Henry is the pen name of American writer William Sydney Porter (1862-1910).
Porters 400 short stories are known for their wit, wordplay, characterization and the clever use of twist endings. They include: The Rose of Dixie, The Third Ingredient, The Hiding of Black Bill, Schools and Schools, Thimble, Thimble, Supply and Demand, Buried Treasure, To Him Who Waits, He Also Serves, The Moment of Victory, The Head-Hunter, A Poor Rule and others.