In Biggles Learns Something, Baron du Fornier was the assumed identity of a criminal and jewel thief known to Scotland Yard as "Sharky the Card". According to Gaskin, Sharky was always a gambler. He had dropped out from view for a while and when Gaskin discovered him at Newmarket Heath in the story, he had apparently been living in France and flying over occasionally to attend race meetings. In the story, he arrived from France in a Sud-Ouest Farfadet gyroplane piloted by Laxter who was operating an illegal cross-Channel taxi service for criminals. At Newmarket, Sharky was immaculately dressed, with binoculars, a member's badge in his buttonhole and a newspaper--every bit like a Baron, but that did not prevent him getting arrested when Gaskin spotted him.