In Biggles Cuts It Fine, Willy was the name of a German seaman who served on board a Russian submarine which called at the Crozet Islands. Willy had served as a submariner in the German navy during the Second World War. As a result of his experience, he was somehow forced to join the crew of the Russian submarine which set sail for the oceans of the world surveying remote remote uninhabited islands for suitable sites as secret military bases.
Willy's submarine first sailed for the southern tip of South America where it did survey work among the islands in the Magellan Straits. It then proceeded to Hog Island in the Crozet group in the Indian Ocean. There, the crew discovered that Willy had contracted consumption and so the submarine sailed for the nearby Possession Island and abandoned Willy there before returning to Hog Island to continue its survey work.
At Possession Island, Willy met Alfred Robinson, a cast away British sailor who had been living there for some 4 - 5 months. Alf looked after the sick Willy for six weeks before he finally succumbed to his sickness. Willy was bitter with his shipmates for abandoning him and so told Alf all the details of the submarine's secret mission, information which Alf subsequently passed to Biggles.