At the word the woman made a little forward spring, and the man made a movement to follow.

'Halt!' commanded the guard, at the same time clapping a hand upon the man's shoulder, and then——

It was only the work of a moment.

There was a quick movement on the man's part, and I saw the butt of a big revolver, and called out in warning: 'Take care!' I might have saved my breath. The tall guard stood moveless until the weapon was actually in sight, and then the arm in the blue coat shot out, strong, swift, straight from the shoulder, and the pistol-arm dropped, the weapon fell to the ground, and the man staggered back, to be received in the unwilling arms of the head-waiter, to struggle there for a moment, and then to submit, quite as much to the fire in the young guard's eye as to the strength of his arm. The woman at the first sign of struggle had drawn away from her companion, slipped into the crowd about them, and was making off in haste, when I said, addressing the waiter:

'Must she be stopped?'

The fellow shook his head. 'Let her go,' he said; 'they were dodging their breakfast-bill.'

It was the common trick of a common sharper. Having ordered and eaten a late breakfast, they had called for something additional, and in the absence of the waiter had left their places near the door and slipped away.

It was over in a moment. The man, forced into honesty by strength superior to his own, sulkily paid the bill, while denying the claim, and then, like his companion, he slipped through the crowd and was soon out of sight.

Meantime, my friend the guard, with a look of disgust and weariness upon his face, had turned away the moment his duty was done, and I followed him, smiling a little over this reversal of our positions.

'Well,' I said, as I reached his side, 'I see there is good reason for your ability to judge a "straight-from-the-shoulder" knock-out blow.'