O. Henry, one the most famous magazine bylines of the early 20th century, first appeared over a short story in McClure’s magazine called “Whistling Dick’s Christmas Stocking.” As readers would eventually learn, “Henry” was actually William Sydney Porter, a convicted embezzler doing time at the Federal pen in Columbus, Ohio, and sending out stories under a variety of pseudonyms. With the 1898 McClure’s sale, O. Henry became the one that stuck. Porter went on to write other Christmas tales, including his most famous, “The Gift of the Magi.” Incidentally, Porter was briefly the editor and owner of a weekly humor publication called The Rolling Stone.