sham engagements, when, imagining the sample trenches to be held by Germans, a company would storm them to drive out the "enemy."

In fair and rainy weather this work went on, and it rained more often than not, as Jerry wrote home to his mother. The chums could write, but there was no telling when the missives would be delivered, nor when they would get any in return, for there was such congestion that the mail service broke down at times, and no wonder. So, though eventually the home folks--and in them is included "the girls"--got all the mail intended for them, there were days of anxious waiting.

Meanwhile the Motor Boys were perfecting themselves as soldiers, and were winning the commendation of their officers. Jerry was promoted to be first corporal, and in his squad of seven were Ned and Bob, much to their delight.

"It's a pleasure to take orders from you, old man," said Ned.

"Well, I won't give any more than I have to," remarked the tall lad, now taller and more bronzed than ever.

Professor Snodgrass had managed to find quarters in a village not far from camp, and from there he came to see the boys occasionally. He was getting his affairs in shape to proceed with the study of the matter at present under his attention.

"Have you heard anything from Miss Petersen or Miss Gibbs?" asked Jerry.

"No, not a word," was the answer. "I have sent several letters, and made inquiries of the authorities here, but the latter give me very little encouragement. That's bad, too; for I've just had word from home that makes my share in that inheritance seem of more importance than ever," and the professor gave a little sigh.

"Why, what's happened, Professor?" questioned Jerry, with quick sympathy.

"I lent some money," explained Professor Snodgrass, "to one of my friends--an old friend with whom I went through college--to help him over a hard place. But he has not got over his troubles; in fact, his affairs are growing worse, and it looks as if I would never get my money back. And that will cripple me, cripple me badly, boys. Yes, I need the money that Professor Petersen was good enough to leave me."

"Well, let's hope that you find those girls quickly, Professor, and get that inheritance very soon," said Ned.

"But I am afraid I shall have to wait until you boys capture Germany, and then I 

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