But presently the big guns began to boom, and then it became evident that the attack of the Germans, for such it turned out to be, was against a sector some distance removed from where the Khaki Boys were on duty. They, with their companions, were held in reserve. They remained to guard the trench. After the exchange of a few shots with their unseen Hun adversaries, quiet once more settled down over that part of the lines. But a sharp engagement was going on to the left, and the next morning it was learned that the Boches had captured a number of Americans, having surprised them. It was not all clear gain, however, for several of the Huns were killed.
And when Jimmy and his chums went off duty they heard disquieting rumors to the effect that the Germans must have had information about the weakness of the line that they attacked. For it was weak, and that was the reason the raid was so successfully made.
"How did the Germans know it?" asked Roger.
"Someone on our side gave the information," said Jimmy. "At least, that's what I heard."
"You mean traitors?" gasped Bob.
"It amounts to that—yes," was Jimmy's reply.
[CHAPTER XI]
THE SIGNALS
"Say, where'd you hear all this?" demanded Roger. "Is it straight goods?"
"Sure it is," answered Jimmy. "Talk of it all over. I got it from one of the orderlies at brigade headquarters."