In the Second World War, Duquesne ran a German spy ring in the United States until he was caught by the FBI in what became the biggest roundup of spies in U.S. history: the "Duquesne Spy Ring". Coincidentally, Kitchener's brother was to die in office in Bermuda in 1912, and his nephew, Major H.H. "Hap" Kitchener, who had married a Bermudian, purchased (with a legacy left to him by his uncle) Hinson's Island, part of the former Prisoner of War camp from which Duquesne had escaped, after the First World War as the location of his home and business.