He washed and dressed his wounds as best he could, partook of a light breakfast, and then asked the man who had rescued him to inform the officer on the beat below that something unusual had taken place in the old man’s flat the night before.

“That will place the matter in the hands of the police,” he said. “I don’t want to take a hand in it just yet.”

The man soon came back, and reported that the policeman had broken in the door, and found the old man lying bound and gagged on the bed. A large amount of money and some valuable jewelry had been taken.

“And you have the clew?” said the man, inquiringly.

“Yes, but I can’t give it now. I want to have another interview with those people downstairs before the officers get hold of them.”

“And they are in with the burglars?”

“It seems so. How long have they lived there?”

“About two weeks.”

“It is a part of the electric-drill scheme,” said Nick.

“What’s that?”