"But if the signals can be seen by the Germans, why can't they be seen by our men?" asked Roger. "And if they are seen, the location ought to be easy to come at."
"I don't know what the reason is," replied Jimmy, "but I know they haven't discovered the traitors as yet. It's getting serious, let me tell you!"
"I should say so!" agreed Bob.
It was about a week after the discovery that secret signals were aiding the Germans that Jimmy, coming back from a visit to the hospital where he had called to see a wounded chum, startled his friends by saying:
"I've heard from Franz!"
"No!" cried Bob incredulously.
"Yes," asserted Jimmy emphatically. "Listen while I tell you!"
[CHAPTER XII]
NEWS FROM THE AIR
Now don't get all worked up with hope," went on Jimmy, as his chums gathered about him. "While I have news from poor old Schnitz, it isn't exactly good news."