Again they listened, then opened the door wider and slipped inside. It was evident that they were well acquainted with the place. While one of them remained in the big living room, another went to the door of Verbeck's bedchamber, and a third to the door of the room used by Muggs.
There came a sharp hiss. The doors were opened. Figures darted across rooms. Two vapor guns were discharged, and Roger Verbeck and Muggs were instantly rendered unconscious as they slept.
"Easy work!" one of the men commented. "Get busy, now!"
Muggs was gagged and bound and lashed to the bed. Roger Verbeck was dressed quickly by two of the men, while the third remained in the living room, listening. When Verbeck had been made ready, the man in the living room slipped into the hall, saw that nobody was there and that the elevator was still in the basement. He returned and gave a signal, and the other two picked up Verbeck and carried him into the hall.
They went down the stairs, flight by flight, meeting nobody, and finally came to the office again, where the fourth man was waiting. The telephone operator had returned and had been rendered unconscious by means of a vapor gun.
They carried Verbeck to the automobile, put him in it, got in themselves, and the machine darted away. Verbeck groaned, and once more a vapor gun was discharged in his face. He relaxed.
"That'll do him until we get to headquarters," one of the men said. "We don't want him sick, and that stuff is pretty strong. What do you suppose the boss is going to do with him?"
