"They're gluttons for punishment," remarked Bart. "The first-line trench is junk from the mine explosion, but they won't give this second one up without making one mighty effort to get it back." The young soldiers were working feverishly to organize the captured position, when their corporal, Wilson, summoned them out and they scrambled forth promptly and stood at attention. "Fall in to take back the prisoners," he ordered. A look of disappointment came over their faces and Wilson's eyes twinkled when he saw it. "Haven't you had enough fighting yet?" he demanded. "Well, I feel that way myself, but orders are orders. Come along." "Hard luck," muttered Frank in a low tone to Bart, as they obeyed the command. "We'll miss some lovely fighting," agreed Bart. "I was just getting warmed up," mourned Billy. "Don't worry," advised Tom. "We'll be sent back after we get these fellows to headquarters, and we'll have a chance to get another crack at them." The prisoners, having been searched, were placed in double file between the members of the guarding squad, who walked at a few paces interval on either side of them. "Fall in!" came the corporal's order. "Shoulder arms. March!" They started out briskly. Frank and Bart happened to be close beside the big German corporal whom they had before observed. His wrath was not yet abated, and he kept up a volley of epithets as he sullenly marched along. "He's making as much fuss as though he were the Kaiser," chuckled Tom, who was vastly amused at the prisoner's antics. "Slap him on the wrist and tell him to be nice," counseled Billy with a grin. The captive glared at them with insane rage in his eyes. "I think he's going nutty," remarked Bart. "It's lucky for him there aren't any squirrels around." "You want to keep your eye peeled for him," warned Frank. "He's bad medicine." "He's safe enough," replied Bart, carelessly. "He hasn't any weapon, and if he started to run he wouldn't get far. He isn't cut out for a sprinter." "Even if he were, a bullet would catch him," chimed in Billy. "He'd make a big target and it would be a pretty bad shot that would miss him." When they reached the blown-up first trench they found it difficult to keep in line, and had to pick their way over the heaped-up ruin that had been made by the mine explosion. Bart tripped over a strand of broken wire, and in trying to save himself from falling, his rifle slipped from his hand. The German corporal was within a foot of him and saw his opportunity. Quick as a flash he drew from his clothing a trench knife that the searchers had overlooked. The murderous blade gleamed in the air as the corporal brought it down toward the neck of Bart, who had stooped to pick up his rifle. CHAPTER III TAKING CHANCES "Look out, Bart!" yelled Billy, while Tom made a desperate leap to his comrade's rescue. But Frank was quicker than either.