ledge some fifteen feet below him a German soldier prone behind an embankment of loose rock and leafy boughs that hid him from the view of the British lines. The man must have been an excellent shot for he was well back of the German lines, firing over the heads of his fellows. His high-powered rifle was equipped with telescope sights and he also carried binoculars which he was in the act of using as Tarzan discovered him, either to note the effect of his last shot or to discover a new target. Tarzan let his eye move quickly toward that part of the British line the German seemed to be scanning, his keen sight revealing many excellent targets for a rifle placed so high above the trenches.
The Hun, evidently satisfied with his observations, laid aside his binoculars and again took up his rifle, placed its butt in the hollow of his shoulder and took careful aim. At the same instant a brown body sprang outward from the cliff above him. There was no sound and it is doubtful that the German ever knew what manner of creature it was that alighted heavily upon his back, for at the instant of impact the sinewy fingers of the ape-man circled the hairy throat of the Boche. There was a moment of futile struggling followed by the sudden realization of dissolution—the sniper was dead.
Lying behind the rampart of rocks and boughs, Tarzan looked down upon the scene below. Near at hand were the trenches of the Germans. He could see officers and men moving about in them and almost in front of him a well-hidden machine gun was tra-
