Chapter 57

One day old Desroques seemed unusually thoughtful. He obviously imagined he had hit on a fresh clue, or, at any rate, a new factor in the tragic problem. After a prolonged silence he addressed Béchoux at his post: “Inspector, my friends and I have come to the conclusion that the only human being who can possibly throw any light on how the photograph disappeared is the policeman who stopped my son in his flight the day he was arrested. It’s rather curious that he has never been called to give evidence. His name has …