The cry came sharply from directly behind the labor leader, and its threat was unmistakable.

Leyburn turned at the hoarse demand. The chauffeur stood up. Both found themselves looking into the muzzles of revolvers. Two masked men stood confronting them, while a third was waiting close by.

The chauffeur promptly complied with the order. He felt that he had nothing to gain by refusing. He remembered in time that he had only a few dollars in cash on him, and no valuables.

Leyburn was less quick to respond. Light had broken in upon his quick brain, and his thoughts had gone back to the telephone message.

Another sharp order brought his wandering attention back to the exigencies of the moment, and his hands were slowly raised above his head.

Then the third man became active. Without a moment's hesitation, and in absolute silence, he ran his hands down the labor leader's pockets. Then he produced a rope, and taking hold of his arms forced them to his sides, finally securing them behind his back. Once his man was completely trussed he turned his attention to the other, treating him to similar attentions.

The whole thing was the work of a few moments. Leyburn, impotently raging, was left quite helpless. So sudden and startling had been the attack, so unsuspected, that its success was complete; and even protest became impossible before the threat of his assailants' weapons.

Now more than ever he knew he had been trapped by the telephone message. But why, and by whom? Robbery? It was absurd. The money he had on him would not pay these men for their trouble and risk.

No, it was not robbery. Then he remembered Hendrie and the firing of his crop. In a moment he became anxious, and narrowly scrutinized the figures of his assailants. Two of them were large, and the third was a lean creature, tall enough, but small beside the other two. Each man's face was completely covered by a long black mask. He could not tell even if they were bearded.

His suspicions once aroused, however, he quickly made up his mind that this was the work of his arch-enemy, and he knew that, for the time, at least, he stood at his mercy.