The salute was repeated, scarcely above a whisper, but clear enough for Irving to hear it distinctly. And with the utterance of that word another thrill of apprehension, doubt, confusion, electrified the mind and body of the listening scout, who had not been discovered by Tourtelle and the boches when the lights illuminated the field, undoubtedly, because he happened to be crouching close to a bush large enough to cast a shadow about him.
"My!" exclaimed the boy under his breath; "I'd 'ave sworn that word came from the very spot where Tourtelle was standing. They can't 'ave changed positions so quickly. And yet, I must be mistaken. Common sense tells me it must 'ave been the boche who gave that salute. I wonder what's the matter with my hearing.
"But I'll have to go to that miserable 'shave-tail's' rescue if the other fellow plays a trick on him. I think I'll get close and see what's going on."
Irving crept cautiously toward the spot where he had seen the second lieutenant when the lights blazed forth. The distance was so short that he fancied he ought to have been able to see both the officer and the enemy scout from his position near the bush. The boche, unless he had moved since the lights went out, was a similar distance away from the watcher and about twenty-five feet to Private Ellis' right.
In a few seconds Irving reached approximately the spot where he had seen Lieut. Tourtelle, when the "very lights" illuminated the vicinity, and was surprised and just a little worried on failing to find him still there. Then he began to look around him to see if his eyes could not pierce the surrounding darkness far enough to discover the form of the officer. His search was interrupted by another startling incident.
Something struck the calf of his right leg a rather severe blow, and the boy gripped his trench-knife in one hand and his pistol in the other, ready to defend himself if attacked. Nothing further of disturbing nature followed immediately, and Irving stooped down to examine the object that had struck him. It was a short, stout club of the kind known in No Man's Land as a "persuader stick," which can be used effectively, like a policeman's billy, in the dark.
"Who in the world threw that?--not the boche, surely," the boy muttered. "It's like the one I've seen in 'the turtle's' possession; but what could he want to throw it back here for?"
"Kamerad!"
"There it goes again," buzzed through Irving's head. "I don't believe it's a trap set for me, but maybe it is for the 'looie,' and he may be just fool enough to fall for it. I owe it to--to--Uncle Sam to save him, if I can, though I'm afraid Uncle Sam 'u'd be better off without 'im."
Private Ellis put his knife and pistol away, gripped his club, and advanced toward the spot whence the last "kamerad" seemed to have come. As he moved ahead slowly he became conscious gradually that a dark object stood before him a few yards away. Would he be able to determine whether it was friend or foe? He was in doubt on this question and determined to exercise the greatest care and caution.