first law of Nature, went mad. Screaming and clawing he attempted to turn upon the ape-thing clinging to his back. For an instant he toppled upon the now wildly gyrating limb, clutched frantically to save himself, and then plunged downward into the darkness with Tarzan still clinging to him. Crashing through splintering branches the two fell. Not for an instant did the ape-man consider relinquishing his death-hold upon his adversary. He had entered the lists in mortal combat and true to the primitive instincts of the wild—the unwritten law of the jungle—one or both must die before the battle ended.

Sheeta, catlike, alighted upon four out-sprawled feet, the weight of the ape-man crushing him to earth, the long knife again imbedded in his side. Once the panther struggled to rise; but only to sink to earth again. Tarzan felt the giant muscles relax beneath him. Sheeta was dead. Rising, the ape-man placed a foot upon the body of his vanquished foe, raised his face toward the thundering heavens, and as the lightning flashed and the torrential rain broke upon him, screamed forth the wild victory cry of the bull ape.

Having accomplished his aim and driven the enemy from his lair, Tarzan gathered an armful of large fronds and climbed to his dripping couch. Laying a few of the fronds upon the poles he lay down and covered himself against the rain with the others, and despite the wailing of the wind and the crashing of the thunder, immediately fell asleep.

Chapter II

The Lion's Cave

The rain lasted for twenty-four hours and much of the time it fell in torrents so that when it ceased, the trail he had been following was entirely obliterated. Cold and uncomfortable—it was a savage Tarzan who threaded the mazes of the soggy jungle. Manu, the monkey, shivering and chattering in the dank trees, scolded and fled at his approach. Even the panthers and the lions let the growling Tarmangani pass unmolested.

When the sun shone again upon the second day and a wide, open plain let the full heat of Kudu flood the chilled, brown body, Tarzan's spirits rose; but it was still a sullen, surly brute that moved steadily onward into the south where he hoped again to pick up the trail of the Germans. He was now in German East Africa and it was his intention to skirt the mountains west of Kilimanjaro, whose rugged peaks he was quite willing to give a wide berth, and then swing eastward along the south side of the range to the railway that led to Tanga, for his experience among men suggested that it was toward this railroad that German troops would be likely to converge.

Two days later, from the southern slopes of Kilimanjaro, he heard the boom of cannon far away to the east. The afternoon had been dull and cloudy and now as he was passing through a narrow gorge a few great drops of rain began to splatter upon his naked shoulders. Tarzan shook his head and growled his disapproval; then he cast his eyes about for shelter, for he had had quite enough of the cold and drenching. He wanted to hasten on in the direction of the booming noise, for he knew that there would be Germans fighting against the English. For an instant his bosom swelled with pride at the thought that he was English and then he shook his head again viciously. "No!" he muttered, "Tarzan of the Apes is not English, for the English are men and Tarzan is Tarmangani;" but he could not hide even from his sorrow or from his sullen hatred of mankind in general that his heart warmed at the thought it was Englishmen who fought the Germans. His regret was that the English were human and not great white apes as he again considered himself.

"Tomorrow," he thought, "I will travel that way and find the Germans," and then he set himself to the immediate task of discovering some shelter from the storm. Presently he espied the low and narrow entrance to what appeared to be a cave at the base of the cliffs which formed the northern side of the gorge. With drawn knife he approached the spot warily, for he knew that if it were a cave it was doubtless the lair of some other beast. Before the entrance lay many large fragments of rock of different sizes, similar to others scattered along the entire base of the cliff, and it was in Tarzan's mind that if he found the cave unoccupied he would barricade the door and insure himself a quiet and peaceful night's repose within the sheltered interior. Let the storm rage without—Tarzan would remain within until it ceased, comfortable and dry. A tiny rivulet of cold water trickled outward from the opening.

Close to the cave Tarzan kneeled and sniffed the ground. A low growl escaped him and his upper lip curved to expose his fighting fangs. "Numa!" he muttered; but he did not stop. Numa might not be at home—he would investigate. The entrance was so low that the ape-man was compelled to drop to all fours before he could poke his head within the aperture; but first he looked, listened, and sniffed in each direction at his rear—he would not be taken by surprise from that quarter.

His first glance within the cave revealed a narrow tunnel with daylight at its farther end. The interior of the tunnel was not so dark but that the ape-man could readily see that it was untenanted at present. Advancing cautiously he crawled toward the opposite end imbued with a full realization of what it would mean if Numa should suddenly enter the tunnel in front of him; but Numa did not appear and the ape-man emerged at length into the open and stood erect, finding himself in a rocky cleft whose precipitous walls rose almost sheer on every hand, the tunnel from the gorge passing through the cliff and forming a passageway from the outer world into a large pocket or gulch entirely enclosed by steep walls of rock. Except for the small passageway from the gorge, there was no other entrance to the gulch which was some hundred feet in length and about fifty in width and appeared to have been worn from the rocky cliff by the falling of water during long ages. A tiny stream from Kilimanjaro's eternal snow cap still trickled over the edge of the rocky wall at the upper end of the gulch, forming a little pool at the bottom of the cliff from which a small rivulet wound downward to the tunnel through which it passed to the gorge beyond. A single great tree flourished near the center of the gulch, while tufts of wiry grass were scattered here and there among the rocks of the gravelly floor.

The bones of many large animals lay about and among them were several human skulls. Tarzan raised his eyebrows. "A man-eater," he murmured, "and from appearances he has held sway here for a long time. Tonight Tarzan will take the lair of the man-eater and Numa may roar and grumble upon the outside."

The ape-man had advanced well into the gulch as he investigated his surroundings and now as he stood near the tree, satisfied that the tunnel would prove a dry and quiet retreat for the night, he turned to retrace his way to the outer end of the entrance that he might block it with boulders against Numa's return, but even with the thought there came something to his sensitive ears that froze him into statuesque immobility with eyes glued upon the tunnel's mouth. A moment later the head of a huge lion framed in a great black mane appeared in the opening. The yellow-green eyes glared, round and unblinking, straight at the trespassing Tarmangani, a low growl rumbled from the deep chest, and lips curled back to expose the mighty fangs.

"Brother of Dango!" shouted Tarzan, angered that Numa's return should have been so timed as to frustrate his plans for a comfortable night's repose. "I am Tarzan of the Apes, Lord of the Jungle. Tonight I lair here—go!"

But Numa did not go. Instead he rumbled forth a menacing roar and took a few steps in Tarzan's direction. The ape-man picked up a rock and hurled it at the snarling face. One can never be sure of a lion. This one might turn tail and run at the first intimation of attack—Tarzan had