The scout stopped and thought. There was some sort of break in the rock here.
Danny had a flashlight in his pocket which he had been too cautious to use. He thought of it now, and hesitated. Then he slipped it out and pressed the spring.
Before him was what seemed the door of a cave. He looked closer. Yes, the wire led into the cave. Darkness, again, for he was afraid to use his light any longer.
Danny dropped to his all-fours and crept into the black hole. A floor of soft sand helped him to advance noiselessly. After a few yards the scout reached a turn in the rocky passageway, and——
His eye caught a big, black-hooded shadow humped over a point of light!
Danny withdrew quickly behind the sheltering turn in the wall, and crouched in the sand, dead-still. But his blood was up. He took a second look.
A man was sitting over some sort of instrument, and over his ears were cups, something like Danny had seen worn by the girl at the telephone central station. The one point of light in the big dark recess was turned on a note-book under the man's hand.
The young scout drew back, and crept silently out of the cavern.
Out under the stars again, and this time with his blood on fire! A spy, a German spy sat in that cave and sent messages——!
Only yesterday a fleet of transports had slipped out of the harbor, with thousands of American soldiers on board—submarines—sea-raiders!