"This is what probably put the idea into his head, after first, in some way, having discovered old Max Diestricht's hiding place; and, if I had given him time enough, he would probably have stuck one of these seals, in clumsy imitation of that little eccentricity of mine, on the wall over there to stamp the job as genuine. You begin to get it, don't you, Lannigan? Pretty sure-fire as an alibi, eh? And he'd have got away with it, too, as far as you were concerned. He had only to fire that shot, smash the window, tuck his false beard, mustache, and peaked cap into his pocket, put on his own hat that you see there on the floor—and yell that the man had escaped. He'd help you chase the thief, too! Rather neat, don't you think, Lannigan? And worth the risk, too, considering the howl that would go up at the, theft of those stones, and that, known as the slickest diamond thief in the country, he would be the first to be suspected—except that the police themselves, in the person of Inspector Lannigan of headquarters, would be prepared to prove a perfectly good alibi for him."
Lannigan's head was thrust forward; his eyes, hard, were riveted on Whitey Mack.
"My God!" he said again under his breath. Then fiercely: "He'll get his for this!"
It was a moment before Jimmie Dale spoke; he was musingly examining the automatic in his hand.
"I am going now, Lannigan," he observed quietly. "I require, say, fifteen minutes in which to effect my escape. It is, of course, obvious that an alarm raised by you might prove extremely awkward, but a piece of canvas from that bench there, together with a bit of string, would make a most effective gag. I prefer, however, not to submit you to that indignity. Instead, I offer you the alternative of giving me your word to remain quietly where you are for—fifteen minutes."
Lannigan hesitated.
Jimmie Dale smiled.
"I agree," said Lannigan shortly.
Jimmie Dale stepped back. The electric-light switch
