“Call the police,” he said to Chick, “and leave them in charge of the building. We may have further use for some of the traps here. Wait! Here is a phone.”

He called his private number and waited impatiently. At length the voice of Joseph came over the wire.

“Have you had visitors to-night?” asked Nick.

“We certainly have,” came the reply, with a tinge of triumph in the tones.

“Did they get into the house?” asked Nick anxiously.

“No, sir,” was the reply. “I made short work of the thieves. One was wounded and taken to the hospital, and the others escaped.”

After some further conversation Nick hung up the receiver.

“This has been a bad night for the Great Diamond Syndicate,” he said.

“That is a new one on me,” said Chick, and in a few words Nick explained the interview with the chief of the syndicate.