Frank Abbott was pleasantly occupied in forgetting that he was a Detective Inspector. Certainly no one meeting him for the first time would have suspected him of having any connection with Scotland Yard or the inexorable processes of the law, though he might just possibly have been a barrister. He had, in fact, been intended for the Bar, but his father’s sudden death had necessitated some occupation more likely to solve the immediate problem of food to eat and a roof over his head. With more relations than anyone in England—his paternal great-grandfather had married three times and done his duty by the nation to the extent of having some two dozen children—he had never lacked a social background. In the country he could stay in almost any county without having to incur an hotel bill, and in town he received a good many more invitations than he was able to accept. When he was younger his immediate superior Chief Inspector Lamb, always on the alert for symptoms of wind in the head, had composed a special homily on the subject of Social Dissipation and its Inevitable and Deteriorating Results, which he delivered so often that Frank could have picked it up at any given point and finished it for himself. Although not now so much in use as formerly, it was still liable to be dug out, re-furbished, and delivered with undiminished vigour.