“It is sad,” said the officer, with a shrug of his shoulders, “but now that war has been declared, and we do not know what will befall the Fatherland, we must do many things that would never happen in times of peace. So while I am sorry for the boy with the sick mother, it must not interfere with my orders, which were that no one should be allowed to pass on toward the Belgian border unless he showed proof that he was in the service of the Central Government.”

“I am sorry to hear you say that, sir,” Thad told him.

“There is still more,” continued the other, sternly; “this is the second warning you have had to turn back. We received word by telephone from the bridge to look out for four American boys in scout uniforms. Be careful how you risk a third offence, for I fear it would result in your being thrown into prison. And remember, it is a long way from the country of the Rhine to your Washington.”

What he said gave the four chums a cold feeling. They knew he meant that no matter how innocent of any intention to do wrong they might claim to be, if they persisted in breaking the rules laid down by the German Government for war times, why they must take the consequences, which could not be very pleasant.

All of those castles in the air which Bumpus had been conjuring up during their short ride now came tumbling in ruins to the ground.

“I guess we’ll have to give it up, fellows,” he groaned, “and take our medicine the best way we can. We’ve tried our hardest to get out of this beastly country; and no one can blame us for not succeeding. But I hate to think of my poor sick mother over there, waiting and waiting for me to come to help her, that’s what!”

CHAPTER V.
AT THE FERRY.

“If at first you don’t succeed, try, try again!”

Giraffe was one of those fellows with a disposition very much like a rubber ball; when crushed down by some sudden disappointment he would come up again on the rebound.

“Here’s that other road!” remarked Thad; “and do you see any one following after us, to watch, and find out what we do?”