After a minute or two he ventured to peer out. The light which came from a searchlight which was being tested by the enemy was darting about, now here, now there, but evidently without any special purpose in view, and his first fear that it had betrayed his hiding place subsided. But another apprehension took its place at once, for he saw a man in an officer’s uniform coming directly toward him.

Frank instinctively felt for his revolver, but he dismissed that thought before his hand touched the butt. With enemies swarming all about him, a shot at that moment would be little less than suicide. But his knife was still there, and his hand closed around its handle while his lips tightened with resolution.

The officer came on and Frank crouched for a spring in case he should be discovered. But to his great relief, the officer paused just before he reached the tree, drew a pipe from his pocket and lighted it. Then with a grunt of satisfaction he leaned up against the tree and puffed away, while he looked at the animated scene from which he had withdrawn for a few minutes of rest and relaxation.

The tobacco was vile, more like burning leaves than anything else, and as the clouds from the pipe enveloped Frank, he had all he could do to keep from coughing or sneezing. But he kept the impulse in check and waited with what patience he could command for the officer’s next move.

The searchlight was flashing in another quarter now, for which Frank was devotedly thankful, but there was still too much light to make it safe for the young American to attempt to crawl away. He glanced at his watch and saw that it was nearly midnight. The corporal and his chums would be waiting for him.

With infinite caution he peered around the side of the tree. Would that pipeful never be smoked out?

The officer had shifted his position somewhat, and Frank caught a glimpse of a paper protruding from an outside pocket of his coat. It looked like an official document of some kind. The thought came to Frank that it might contain some plans of the enemy for the next day’s fighting.

It was a tremendous risk to attempt to get it, but Frank resolved to take the chance.

Drawing his knife and holding it ready for instant action, his other hand reached slowly around the tree and crept toward the officer’s pocket.

CHAPTER IV
IN THE TUNNEL