Murphy started, then glanced around.

"Hell!" he exclaimed. "Where's that guy gone to, anyway?"

Marsh, who had recently been close at their heels, was not now in the group. Murphy moved on tiptoe to the kitchen door and listened. On the other side of the dining room was the doorway to the entrance hall, and through the now drawn curtains this space was visible. Murphy could see that both these rooms were deserted, but an occasional swishing sound came to his ears. Turning to the waiting group, he silently and significantly jerked his head toward the front of the apartment. Following his example, they moved cautiously across the dining room and the hall and stopped at the door of the living room.

Marsh, with his back toward them, was just in the act of pulling a heavy, upholstered chair back into position. His moving of similar articles of furniture had made the sounds heard by Murphy.

Stepping suddenly into the room, Murphy inquired, with a note of sarcasm in his voice, "Kind of busy, ain't you?"

Marsh turned abruptly. If they expected to see any signs of confusion on his face they were disappointed, for he simply smiled cheerfully.

"Just following out a line of thought," he answered.

"What's the big idea!" asked the plain-clothes man, suspiciously, as he also stepped into the room and carefully looked over the man before him.

"Well, detectives in novels always search minutely for things which may not be apparent to the eye. When confronted with so deep a mystery as this one, I thought the application of a little of the story book stuff might do no harm."

"Huh!" snorted the plain-clothes man, as Marsh finished giving this information. "You're more than commonly interested in this affair, ain't you?"