“The first,” continued Dexter, “is you and Cavanagh, and English law generally. My idea—if I can get hold of the slipper again—oh! you needn’t stare; I’m out for it!—is to get the Antiquarian Institution to ransom it. It’s a line of commercial speculation I have worked successfully before. There’s a dozen rich highbrows, cranks to a man, connected with it, and they are my likeliest buyers—sure. But to keep the tone of the market healthy there’s Hassan of Aleppo, rot him! He’s a dangerous customer to approach, but you’ll note I’ve been in negotiation with him already and am still, if not booming, not much below par!”

“Quite so,” said Bristol. “But you’ve cut off a pretty hefty chew nevertheless. They used to call you The Stetson Man, you used to dress like a fashion plate and stop at the big hotels. Those days are past, Dexter, I’m sorry to note. You’re down to the skulking game now and you’re nearer an advert for Clarkson than Stein-Bloch!”

“Yep,” said Dexter sadly, “I plead guilty, but I think here’s Carneta!”

Bristol heard the door of the outer office open, and a moment later that upon which his gaze was set opened in turn, to admit a girl who was heavily veiled, and who started and stood still in the doorway, on perceiving the situation. Never for one unguarded moment did the American glance aside from his prisoner.

“The Inspector’s dropped in, Carneta!” he drawled in his strident way. “You’re handy with a ball of twine; see if you can induce him to stay the night!”

The girl, immediately recovering her composure, took off her hat in a businesslike way and began to look around her, evidently in search of a suitable length of rope with which to fasten up Bristol.

“Might I suggest,” said the detective, “that if you are shortly quitting these offices a couple of the window-cords neatly joined would serve admirably?”

“Thanks,” drawled Dexter, nodding to his companion, who went into the outer office, where she might be heard lowering the windows. She was gone but a few moments ere she returned again, carrying a length of knotted rope. Under cover of Dexter’s revolver, Bristol stoically submitted to having his wrists tied behind him. The end of the line was then thrown through the ventilator above the door which communicated with the outer office and Bristol was triced up in such a way that, his wrists being raised behind him to an uncomfortable degree, he was almost forced to stand upon tiptoe. The line was then secured.

“Very workmanlike!” commented the victim. “You’ll find a large handkerchief in my inside breast pocket. It’s a clean one, and I can recommend it as a gag!”

Very promptly it was employed for the purpose, and Inspector Bristol found himself helpless and constrained in a very painful position. Dexter laid down his revolver.