At the end of WW1, Biggles and fellow pilots contend with enemies in their own Sopwith Camels. "The Camel closed up until it was flying beside him; the pilot smiling. Biggles showed his teeth in what he imagined to be an answering smile. 'You swine,' he breathed: 'you dirty, unutterable, murdering swine! I'm going to kill you if it's the last thing I do on earth.'"