Follow the adventures of Harry Fleming, Dick Mercer, and Jack Young in this exciting Boy Scout adventure! Harry is an American Boy Scout separated from his country and hometown when his father has to go on a trip to England for business. He joins a Boy Scout troop there and meets Dick Mercer. Together they help solve an exciting mystery in the midst of heliographs, spies, and traps, finding their way to the spy headquarters, Bray Park. They must solve a mystery and save England, with the help of a Boy Scout they meet along the way, Jack Young. (Kangaroo692)