Something struck the lad a sharp blow upon the shoulder, numbing it.

Behind him the lad heard rocks and other debris crashing to the bottom.

Holding his breath, he waited for the blow he felt sure must come from above and unconsciously his right hand stretched out toward where he knew Hal to be.

But nothing struck him. After five seconds of the terrible roaring, there was silence. Chester looked up. There was light above. Chester uttered a short prayer of thankfulness and rose to his feet.

"All right, Hal," he said, still looking above, while he rubbed his injured shoulder.

There was no reply.

Chester looked quickly about him. There was no sign of Hal.

"Great Scott! What can have happened to him?" he asked himself anxiously.

Quickly he fell to hands and knees and explored the bottom of the pit.

There, where he knew Hal should be, he felt a mound of earth.

"Great Scott! He's buried!" cried Chester.

Frantically he set to work with his bare hands to uncover Hal.

In a few moments his efforts were rewarded. He exposed Hal's arm. From the position the arm was in Chester was able to locate his chum's head.

This he uncovered quickly, for he feared that his friend might suffocate.

Then he bent over Hal and listened.

Hal was breathing faintly.

Chester uttered a cry of relief and proceeded to uncover the rest of his friend's body. This done, he set about reviving Hal, who was unconscious.

Chester rubbed Hal's hands vigorously, and was at last rewarded by hearing Hal sigh. A moment later Hal spoke.

"What's happened?" he asked.

"Well, it looks like the world caved in on you," returned Chester.

"Fortunately, appearances are deceitful. I yanked the log loose from above and you were buried in the dirt. Fortunately, I got you out in time. How do you feel?"

"I don't feel very chipper," was the faint reply; "but I guess I'm all right."

"Can you get up?"

"Don't know; I'll try."

He made the effort, and with Chester's a.s.sistance, soon stood leaning against one side of the pit. He looked up.

"Quite a ways up there," he said. "How are we going to make it?"

"Think you can climb up on my shoulders, pull yourself out and then lend me a hand?"

"I don't believe so. Guess I can brace myself while you climb up, though."

"Good, we'll try it."

Once more Chester climbed to Hal's shoulder while the latter braced himself against one wall of the pit. He took a firm hold on the edge above and drew himself up with little difficulty. He was about to reach down and lend Hal a hand when he happened to look toward the east.

"Good night!" he exclaimed and disappeared into the pit in a hurry.

"What's the matter?" demanded Hal, who had not overheard his friend's e.j.a.c.u.l.a.t.i.o.n.

"Matter!" echoed Chester. "There are about ten millions coming this way on the dead run. The French have retreated!"

"Hm-m-m," said Hal; "and what are we going to do?"

"Bide here for a spell, I expect," was Chester's answer.

"Guess you're right. They may not notice us down here. We'll play we're a couple of mice and see how still we can keep."

"Good! Listen! I hear 'em coming!"

Above them, to one side, they could hear the trampling of many feet as the Germans pa.s.sed the pit.

"Guess we're safe enough so long as we stay down here," said Chester.

"But we're going to have trouble reaching the French lines if the Germans are permitted to camp out hereabouts," declared Hal.

"Well, maybe the French will chase them back again," said Chester, hopefully.

"Maybe," Hal repeated, "and then maybe not. Now, if we--h.e.l.lo!"

He broke off suddenly. From above there had come muttered exclamations of alarm, two bodies came hurtling through s.p.a.ce and struck the bottom of the pit with loud thumps.

"Grab 'em, Hal!" shouted Chester, and leaped across the pit.

Hal followed suit, for the two bodies that had tumbled through s.p.a.ce were nothing less than German soldiers who had failed to see the opening above.

They were taken by surprise when two forms leaped on them below, but they put up a fight.

"Tap 'em over the head with your gun!" shouted Chester.

He had drawn his revolver as he leaped forward and now suited the action to the word. The German toppled over with a groan.

Hal, however, had not drawn his weapon, and was now locked in the arms of the second German, as they rolled over and over in the bottom of the pit.

Weakened by his recent experience he was getting the worst of it.

Chester took in the situation at a glance and leaped forward. At the moment Hal was on top and the German stared up at Chester. Seeing a second foe he raised a loud cry for help.

This was what Chester had been afraid of. He didn't want any more Germans down there if he could help it.

"Turn him over, Hal!" he cried. "Let me get a whack at him with my gun."

By a desperate effort Hal obeyed and the German rolled on top of him. One more loud cry he gave and then Chester silenced him with a sharp blow of his revolver b.u.t.t.