Jimmie Dale stepped swiftly backward, and his hand groped out for the droplight, over the end of the bench, that he had knocked against in his own rush.  His fingers clutched it—­and the lower end of the shop was flooded with light.  Except for his felt hat that lay a little distance away, there was no sign of Whitey Mack; the huddled form of the man, who but a moment since had chuckled as he pocketed old Max Diestricht’s gems, lay sprawled, inert, upon the floor, and Lannigan was staring into the muzzle of Jimmie Dale’s automatic.

“Drop that gun, Lannigan!” said Jimmie Dale coolly.  “And I’ll trouble you not to make a noise; it might attract attention from the street; there’s been too much already.  Drop that gun!”

The revolver clattered from Lannigan’s hand to the floor.  A step forward, and Jimmie Dale’s toe sent it spinning under a bench.  Another step, and, his revolver still covering the other, he had whipped a pair of handcuffs from the officer’s side pocket.

Lannigan, as though the thought had never occurred to him, offered no resistance.  He was staring in a dazed sort of way back and forth from Jimmie Dale to the man on the floor.

“What’s this mean?” he burst out suddenly, “Where’s—­”

“Your wrist, please!” requested Jimmie Dale pleasantly.  “No—­the left one.  Thank you”—­as the handcuff snapped shut.  “Now go over there and sit down on the floor beside that fellow.  Quick!” Jimmie Dale’s voice rasped suddenly, imperatively.

Still bewildered, but a little sullen now, Lannigan obeyed.  Jimmie Dale stooped quickly, and snapped the other link of the handcuff over the unconscious man’s right wrist.

Jimmie Dale smiled.

“That’s the approved way of taking your man, isn’t it?  Left wrist to the prisoner’s right.  He’s only stunned; he’ll be around in a moment.  Know him?”

Lannigan shook his head.

“Take a good look at him,” invited Jimmie Dale.  “You ought to know most of them in the business.”

Lannigan bent over a little closer, and then, with an amazed cry, his free hand shot forward and tore away the other’s beard.

It was Whitey Mack!

“My God!” gasped Lannigan.

“Quite so!” said Jimmie Dale evenly.  “You’ll find the diamonds in his pockets, and, excuse me”—­his fingers were running through Whitey Mack’s clothes—­“ah, here it is”—­the thin metal case was in his hand—­“a little article that belongs to me, and whose loss, I am free to admit, caused me considerable concern until I was informed that he had only found it without having the slightest idea as to whom it belonged.  It made quite a difference!” He had opened the case carelessly before Lannigan’s eyes. “‘The Gray Seal!’ I’ll say it for you,” said Jimmie Dale whimsically.  “This is what probably put the idea into his head, after first, in some way, having discovered old Max Diestricht’s