He had tapped an open packet of cigarettes which the sweating sergeant had inefficiently failed to conceal – with the result that the sergeant, in a great awe, obediently took out a cigarette and lit it. “Excellent,” Appleby said. “Now we’re really making progress. As only Mr Heffer saw the old woman, only Mr Heffer can tell us about her. Mr Heffer, go ahead.” “What’s that?” Heffer had started – so that Appleby received the momentary impression that the young man hadn’t been listening. Indeed, it was almost as if he had been listening for something else. “Oh, the old woman. Well, it was pretty queer.” “A number of things seem to me to be that, Mr Heffer. For instance, it isn’t clear to me why we are all holding a sort of vigil in this not very comfortable shop.” “Entirely Mr Heffer’s affair, sir,” Parker interrupted. “I invited him to come to a police station and give his account of the matter there.