Black-and-white photographic postcard portrait of Francis H. McGrath, the famous glass-bottom boat diver and entertainer at Catalina Island, California. Full-length studio portrait shows McGrath in a period swimsuit with "DIVER" lettered on the chest, standing hands-on-hips and smiling. Signed "Francis H. McGrath" at bottom. The back carries an extensive promotional list of marine life specimens visible through Catalina's glass-bottom boats, including kelp, mosses, fish, and shellfish. Undivided back, unused.