and the handle was in a horizontal position, there came a slight jerk on the string. The tweezers were disengaged from the bolt-handle, and fell noiselessly to the carpeted floor. Then as the string was pulled from without, the tweezers disappeared under the crack between the bottom of the door and the sill.
"Childish, what?" commented Vance, when Heath had let him in. "Silly, too, isn't it? And yet, Sergeant dear, that's how the deceased Tony left these premises last Monday night. . . . But let's go into the lady's apartment, and I'll tell you a story. I see that Mr. Spively has returned from his promenade; so he can resume his telephonic duties and leave us free for a causerie."
"When did you think up that hocus-pocus with the tweezers and string?" demanded Markham irritably, when we were seated in the Odell living-room.
"I didn't think it up at all, don't y' know," Vance told him carelessly, selecting a cigarette with annoying deliberation. "It was Mr. Skeel's idea. Ingenious lad—eh, what?"
"Come, come!" Markham's equanimity was at last shaken. "How can you possibly know that Skeel used this means of locking himself out?"
"I found the little apparatus in his evening clothes yesterday morning."
"What!" cried Heath belligerently. "You took that outa Skeel's room yesterday during the search, without saying anything about it?"
"Oh, only after your ferrets had passed it by. In fact, I didn't even look at the gentleman's clothes until your experienced searchers had inspected them and relocked the wardrobe door. Y' see, Sergeant,
