Five minutes later, when they reached a place that was somewhat secluded, Hal suddenly produced his revolver and pressed it against the German's head.
"You will give me immediately what papers you have in your pockets," the lad said quietly. "If you make an outcry I shall be compelled to shoot you."
The German stared aghast.
"What is the meaning of this?" he demanded.
"It means that I must have whatever papers you possess," said Hal, calmly, "even if I have to shoot you to get them."
"Ah!" cried the German, "I see! A spy!"
He made a move as though to seize Hal, but the lad was too quick for him.
With his left hand he grabbed the German's elbow in a tight grip and squeezed. Then, even before the man had time to cry out, the lad released his hold, reversed his revolver quickly and brought the butt down on the German's head with all his force.
The man crumpled up without a word and lay still.
Stubbs, who had witnessed this proceeding in open-eyed wonder, now uttered an exclamation.