He would not entertain any of the objections raised by the boys, but insisted that they share in the treasure which had been recovered from the ocean’s grasp.

A few days later as the boys watched the chalk cliffs of Dover slip away into the eastern horizon Jimmie turned from the rail of the steamer upon which they had taken passage.

“Good by, England, and good by the Mackinders,” he said. “I’m glad we are out of the war zone at last and that we solved the Mystery of the ‘U-13’.”

THE END


The Aeroplane Series

By John Luther Langworthy

1. The Aeroplane Boys; or, The Young Pilots First Air Voyage 2. The Aeroplane Boys on the Wing; or, Aeroplane Chums in the Tropics 3. The Aeroplane Boys Among the Clouds; or, Young Aviators in a Wreck 4. The Aeroplane Boys’ Flights; or, A Hydroplane Round-up 5. The Aeroplane Boys on a Cattle Ranch

The Girl Aviator Series