een apparent to a man
whose every sense was not trained to the highest point of perfection
as were the ape-man's. He noted machine-gun emplacements cunningly
hidden from the view of the British and listening posts placed well
out in No Man's Land.

As his interested gaze moved hither and thither from one point of
interest to another he heard from a point upon the hillside below
him, above the roar of cannon and the crack of rifle fire, a single
rifle spit. Immediately his attention was centered upon the spot
where he knew a sniper must be hid. Patiently he awaited the next
shot that would tell him more surely the exact location of the
rifleman, and when it came he moved down the steep hillside with
the stealth and quietness of a panther. Apparently he took no
cognizance of where he stepped, yet never a loose stone was disturbed
nor a twig broken--it was as though his feet saw.

Presently, as he passed through a clump of bushes, he came to the
edge of a low cliff and saw upon a 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 mov