"How big is this place anyway?" said Earl. "We must be careful going around corners and places like that. We can't see what is waiting for us."
The three boys were by themselves now. They were many yards underground and it was difficult for them to see their way distinctly. They had just emerged into an underground room which was furnished with a bedstead, washstand, table and chairs. The light was dim and the three young soldiers could not make out their surroundings clearly. Suddenly they heard a hoarse cry and the sound of a heavy blow. Jacques, who was in the lead, fell to the ground with a groan.
CHAPTER IV
UNDERGROUND
"Look out, Leon!" cried Earl sharply. "Look out for that fellow."
Leon whirled swiftly in time to see a big-helmeted German with the butt end of his rifle upraised preparing to strike. He ducked almost without thinking and the blow fell harmlessly on the back of one of the chairs in the little room. Before the gun could be raised again Earl sprang upon their foe and grappled with him.
