them. By this time the Germans were aware that something was amiss—that an uncanny sniper had discovered a point of vantage from which this sector of the trenches was plainly visible to him. At first they sought to discover his location in No Man's Land; but when an officer looking over the parapet through a periscope was struck full in the back of the head with a rifle bullet which passed through his skull and fell to the bottom of the trench they realized that it was beyond the parados rather than the parapet that they should search.
One of the soldiers picked up the bullet that had killed his officer and then it was that real excitement prevailed in that particular bay, for the bullet was obviously of German make. Hugging the parados, messengers carried the word in both directions and presently periscopes were leveled above the parados and keen eyes were searching out the traitor. It did not take them long to locate the position of the hidden sniper and then Tarzan saw a machine gun being trained upon him. Before it had gotten into action its crew lay dead about it; but there were other men to take their places, reluctantly perhaps; but driven on by their officers they were forced to it and at the same time two other machine guns were swung around toward the ape-man and put into operation.
Realizing that the game was about up Tarzan with a farewell shot laid aside the rifle and melted into the hills behind him. For many minutes he could hear the sputter of machine-gun fire concentrated upon
