"Nothing doing," he said. "I can hear some of the men talking, but they are evidently playing cards."
"Let me listen a while," said Hal.
Chester passed the receiver to his chum, and the latter listened intently. For some moments he heard nothing save the jabbering jargon of German troopers apparently interested in a card game. He was about to take the receiver from his ear, however, when another voice caught his attention
He held up a hand, which told Chester that something of importance was going on.
"All right, general," said a voice in the German trenches, which was carried plainly to Hal's ear by the Dictaphone.
"Stay!" came another voice. "You will also order Colonel Blucher to open with all his guns at the moment that General Schmidt's men advance to the attack."
"At midnight, sir," was the reply.
"That is all."
The voices became silent.
Quickly Hal reported to Chester what he had overheard.