“It is,” said Wimsey, “and jolly useful when you want to take a good squint at somethin’ and look like a bally fool all the time. Only it don’t do to wear it permanently—if people see you full-face they say: ‘Dear me! how weak the sight of that eye must be!’ Still, it’s useful.”

“Sugg and I explored the ground at the back of the building,” went on Parker, “but there wasn’t a trace.”

“That’s interestin’. Did you try the roof?”

“No.”

“We’ll go over it tomorrow. The gutter’s only a couple of feet off the top of the window. I measured it with my stick—the gentleman-scout’s vade-mecum, I call it—it’s marked off in inches. Uncommonly handy companion at times. There’s a sword inside and a compass in the head. Got it made specially. Anything more?”

“Afraid not. Let’s hear your version, Wimsey.”

“Well, I think you’ve got most of the points. There are just one or two little contradictions. For instance, here’s a man wears expensive gold-rimmed pince-nez and has had them long enough to be mended twice. Yet his teeth are not merely discoloured, but badly decayed and look as if he’d never cleaned them in his life. There are four molars missing on one side and three on the other and one front tooth broken right across. He’s a man careful of his personal appearance, as witness his hair and his hands. What do you say to that?”

“Oh, these self-made men of low origin don’t think much about teeth, and are terrified of dentists.”

“True; but one of the molars has a broken edge so rough that it had made a sore place on the tongue. Nothing’s more painful. D’you mean to tell me a man would put up with that if he could afford to get the tooth filed?”

“Well, people are queer. I’ve known servants endure agonies rather than step over a dentist’s doormat. How did you see that, Wimsey?”