Hugh glanced down, and a grim smile flickered round his lips. In the three chairs sat the motionless, bound figures so swathed in rope that only the tops of their heads were visible, just as Lakington had left him and Toby and Algy earlier in the evening. The only moving thing in the room was the criminal himself, and at the moment he was seated at the table with the Chinese cabinet in front of him. He seemed to be doing something inside with a penknife, and all the time he kept up a running commentary to the three bound figures.

“Well, you young swine, have you enjoyed your night?” A feeble moan came from one of the chairs. “Spirit broken at last, is it?” With a quick turn of his wrist he prised open two flaps of wood, and folded them back against the side. Then he lifted out a parcel of gold and silver tissue from underneath.

“My hat!” muttered Hugh, “what a fool I was not to think of it! Just a false bottom actuated by closing the lid. And a similar parcel in the other cabinet.”

But the American, whistling gently to himself, had his eyes fixed on the rope of wonderful pearls which Lakington was holding lovingly in his hands.

“So easy, you scum,” continued Lakington, “and you thought to pit yourselves against me. Though if it hadn’t been for Irma”—he rose and stood in front of the chair where he had last left Drummond—“it might have been awkward. She was quick, Captain Drummond, and that fool of a chauffeur failed to carry out my orders, and create a diversion. You will see what happens to people who fail to carry out my orders in a minute. And after that you’ll never see anything again.”

“Say, he’s a dream—that guy,” muttered the American. “What pearls are those he’s got?”

“The Duchess of Lampshire’s,” whispered Hugh. “Lifted right under the noses of the whole bally house party.”

With a grunt the detective rearranged his chewing-gum; then once more the four watchers on the roof glued their eyes to the glass. And the sight they saw a moment or two afterwards stirred even the phlegmatic Mr. Green.

A heavy door was swinging slowly open, apparently of its own volition, though Hugh, stealing a quick glance at Lakington, saw that he was pressing some small studs in a niche in one of the walls. Then he looked back at the door, and stared dumbfounded. It was the mysterious cupboard of which Phyllis had spoken to him, but nothing he had imagined from her words had prepared him for the reality. It seemed to be literally crammed to overflowing with the most priceless loot. Gold vessels of fantastic and beautiful shapes littered the floor; while on the shelves were arranged the most wonderful collection of precious stones, which shone and scintillated in the electric light till their glitter almost blinded the watchers.

“Shades of Chu Chin Chow, Ali Baba and the forty pundits!” muttered Toby. “The dam’ man’s a genius.”