Harmonica Frank Floyd was his own best caricature. A hobo and refugee from the old Southern medicine shows who sang and played like a throwback from the 1920s, he was as colorful as they come, and a case could be made that without Frank there wouldn't have been an Elvis. He was born to itinerant parents on October 11, 1908, in Toccopola, MS, and his parents promptly separated without even giving him a proper name (he decided to call himself Frank Floyd as a teen), leaving Frank to be raised by his sharecropping grandparents. He taught himself to play harmonica when he was ten,...