A Sherlock Holmes short story of 7,300 words, narrated by Dr. Watson. Holmes and Watson are in San Francisco, and find themselves defending a Chinese magician accused of kidnapping a little girl. Someone obviously intends for the magician to be lynched, and Holmes calls upon the aid of another magician, renowned prestidigitator and aeronaut Oscar Zoroaster Diggs - otherwise known as the Great and Powerful Oz.