“I don’t know,” replied Hal. “Evidently he scents some kind of danger.” He turned to the dog. “What is it, Marquis?” he demanded.

Marquis’ only answer was a series of deep growls.

“Germans?” asked Hal.

Marquis uttered a short bark.

“That’s what’s the matter,” said Hal, quietly.

At that moment there came riding down a nearby road a troop of German cavalry.

“Quick! down on the ground!” cried Hal. “Perhaps they won’t see us!”

He suited the action to the word, and Chester and Alexis followed his example.

But it was too late. The Germans had espied them and now came toward them at a gallop. Alexis rose to his feet and stretched.

“Another fight,” he said. “Good!”