The young man laughed scornfully. He pointed to something bright held in the teeth of a small brass vice. With a touch of his finger he released it.

"Diamonds!" he scoffed. "Why, I am an expert on sham jewellery!"

Brodie pressed incautiously forward, and Harvey Grimm's left hand swung round with a lightning-like stroke. The detective went over like a log, groaned for a moment and staggered to his feet. Harvey Grimm pressed him back, forced his knotted handkerchief into his mouth, and closed and locked the door through which he had entered. Then he threw off his overall and caught up his coat and overcoat.

"You're a clever fellow, Paul Brodie," he said to the writhing figure upon the floor. "Sorry I can't stop to discuss this matter with you."

He threw a little higher open the window which led into the yard, vaulted through and walked swiftly down the entry. He strolled into the broad thoroughfare, wiping the moisture from his forehead and looking everywhere for a taxi.

"My God!" he muttered to himself. "We're coming near the end of things!"

Listening all the while for footsteps behind which never came, he at last hailed a taxicab and was driven to Aldgate. At the Mansion House he alighted, and in another taxicab made his way to one of the streets on the north side of the Strand. Here he entered a passageway, climbed the stairs past a second-hand clothes shop, and on the second flight opened the door of a room with a latchkey which hung from his chain. He gave a little murmur of relief as he discovered a young man in a dressing-gown, seated in an arm-chair with his feet up on the mantelpiece, reading a paper-backed novel. The young man bore a remarkable resemblance to Mr. Harvey Grimm.

"Thank heaven you are in!" the new-comer exclaimed, commencing like lightning to throw off his clothes. "Turn on the bath, Jim—quick as you can—and take these clothes down to the shop. Shove 'em away anywhere."

The young man was already busying himself about the place.

"Anything wrong, sir?" he asked.