bluffed many in his time—but not now. The missile struck Numa full upon the snout—a tender part of a cat's anatomy—and instead of causing him to flee it transformed him into an infuriated engine of wrath and destruction.

Up went his tail, stiff and erect, and with a series of frightful roars he bore down upon the Tarmangani at the speed of an express train. Not an instant too soon did Tarzan reach the tree and swing himself into its branches and there he squatted, hurling insults at the king of beasts while Numa paced a circle beneath him, growling and roaring in rage.

It was raining now in earnest adding to the ape-man's discomfort and disappointment. He was very angry; but as only direct necessity had ever led him to close in mortal combat with a lion, knowing as he did that he had only luck and agility to pit against the frightful odds of muscle, weight, fangs, and talons, he did not now even consider descending and engaging in so unequal and useless a duel for the mere reward of a little added creature comfort. And so he sat perched in the tree while the rain fell steadily and the lion padded round and round beneath, casting a baleful eye upward after every few steps.

Tarzan scanned the precipitous walls for an avenue of escape. They would have baffled an ordinary man; but the ape-man, accustomed to climbing, saw several places where he might gain a foothold, precarious possibly; but enough to give him reasonable assurance of escape if Numa would but betake himself to the far end of the gulch for a moment. Numa, however, notwithstanding the rain, gave no evidence of quitting his post so that at last Tarzan really began to consider seriously if it might not be as well to take the chance of a battle with him rather than remain longer cold and wet and humiliated in the tree.

But even as he turned the matter over in his mind Numa turned suddenly and walked majestically toward the tunnel without even a backward glance. The instant that he disappeared, Tarzan dropped lightly to the ground upon the far side of the tree and was away at top speed for the cliff. The lion had no sooner entered the tunnel than he backed immediately out again and, pivoting like a flash, was off across the gulch in full charge after the flying ape-man; but Tarzan's lead was too great—if he could find finger or foothold upon the sheer wall he would be safe; but should he slip from the wet rocks his doom was already sealed as he would fall directly into Numa's clutches where even the Great Tarmangani would be helpless.

With the agility of a cat Tarzan ran up the cliff for thirty feet before he paused, and there finding a secure foothold, he stopped and looked down upon Numa who was leaping upward in a wild and futile attempt to scale the rocky wall to his prey. Fifteen or twenty feet from the ground the lion would scramble only to fall backward again defeated. Tarzan eyed him for a moment and then commenced a slow and cautious ascent toward the summit. Several times he had difficulty in finding holds but at last he drew himself over the edge, rose, picked up a bit of loose rock, hurled it at Numa and strode away.

Finding an easy descent to the gorge, he was about to pursue his journey in the direction of the still-booming guns when a sudden thought caused him to halt and a half-smile to play about his lips. Turning, he trotted quickly back to the outer opening of Numa's tunnel. Close beside it he listened for a moment and then rapidly began to gather large rocks and pile them within the entrance. He had almost closed the aperture when the lion appeared upon the inside—a very ferocious and angry lion that pawed and clawed at the rocks and uttered mighty roars that caused the earth to tremble; but roars did not frighten Tarzan of the Apes. At Kala's shaggy breast he had closed his infant eyes in sleep upon countless nights in years gone by to the savage chorus of similar roars. Scarcely a day or night of his jungle life—and practically all his life had been spent in the jungle—had he not heard the roaring of hungry lions, or angry lions, or love-sick lions. Such sounds affected Tarzan as the tooting of an automobile horn may affect you—if you are in front of the automobile it warns you out of the way, if you are not in front of it you scarcely notice it. Figuratively Tarzan was not in front of the automobile—Numa could not reach him and Tarzan knew it, so he continued deliberately to choke the entrance until there was no possibility of Numa's getting out again. When he was quite through he made a grimace at the hidden lion beyond the barrier and resumed his way toward the east. "A man-eater who will eat no more men," he soliloquized.

That night Tarzan lay up under an overhanging shelf of rock. The next morning he resumed his journey, stopping only long enough to make a kill and satisfy his hunger. The other beasts of the wild eat and lie up; but Tarzan never let his belly interfere with his plans. In this lay one of the greatest differences between the ape-man and his fellows of the jungles and forests. The firing ahead rose and fell during the day. He had noticed that it was highest at dawn and immediately after dusk and that during the night it almost ceased. In the middle of the afternoon of the second day he came upon troops moving up toward the front. They appeared to be raiding parties, for they drove goats and cows along with them and there were native porters laden with grain and other foodstuffs. He saw that these natives were all secured by neck chains and he also saw that the troops were composed of native soldiers in German uniforms. The officers were white men. No one saw Tarzan, yet he was here and there about and among them for two hours. He inspected the insignia upon their uniforms and saw that they were not the same as that which he had taken from one of the dead soldiers at the bungalow and then he passed on ahead of them, unseen in the dense bush. He had come upon Germans and had not killed them; but it was because the killing of Germans at large was not yet the prime motive of his existence—now it was to discover the individual who slew his mate.

After he had accounted for him he would take up the little matter of slaying ALL Germans who crossed his path, and he meant that many should cross it, for he would hunt them precisely as professional hunters hunt the man-eaters.

As he neared the front lines the troops became more numerous. There were motor trucks and ox teams and all the impedimenta of a small army and always there were wounded men walking or being carried toward the rear. He had crossed the railroad some distance back and judged that the wounded were being taken to it for transportation to a base hospital and possibly as far away as Tanga on the coast.

It was dusk when he reached a large camp hidden in the foothills of the Pare Mountains. As he was approaching from the rear he found it but lightly guarded and what sentinels there were, were not upon the alert, and so it was an easy thing for him to enter after darkness had fallen and prowl about listening at the backs of tents, searching for some clew to the slayer of his mate.

As he paused at the side of a tent before which sat a number of native soldiers he caught a few words spoken in native dialect that riveted his attention instantly: "The Waziri fought like devils; but we are greater fighters and we killed them all. When we were through the captain came and killed the woman. He stayed outside and yelled in a very loud voice until all the men were killed. Underlieutenant von Goss is braver—he came in and stood beside the door shouting at us, also in a very loud voice, and bade us nail one of the Waziri who was wounded to the wall, and then he laughed loudly because the man suffered. We all laughed. It was very funny."

Like a beast of prey, grim and terrible, Tarzan crouched in the shadows beside the tent. What thoughts passed through that savage mind? Who may say? No outward sign of passion was revealed by the expression of the handsome face; the cold, gray eyes denoted only