The telephone bell in the laboratory jangled sharply. Major Martin answered it and turned to Carnes.

"You're wanted on the telephone, Mr. Carnes."

The detective stepped forward and took the transmitter.

"Carnes speaking," he said. "Yes. Oh, hello, Bolton. Yes, we have Karuska here, or rather his body. Yes, Dr. Bird is here right now. You've what? Great Scott, wait a minute."

"Dr. Bird," he cried eagerly turning from the telephone, "Bolton has located the Washington headquarters of the Young Labor party."

Dr. Bird sprang to the instrument.

"Bird speaking, Bolton," he cried. "You've located their headquarters? Who's running it? Stanesky, eh? You're on the right track; he used to be Saranoff's right hand man. Where is the place located? I don't seem to recollect the spot. You have it well surrounded? Where are you speaking from? All right, we'll join you as quickly as we can. Keep your patrols out and don't let anyone get away."

He hung up the receiver and turned to Carnes.

"Did you have the car wait?" he asked. "Good enough; we'll jump for the Bureau and pick up all the vitrilene laying around loose and then join Bolton. He thinks that he has the whole outfit bottled up."