of a creature whose each and every spinal vertebra grew a thick, heavy horn. Only a portion of the back was visible to the ape-man, the rest of the body being lost in the dense shadows beneath the tree, from whence there now arose the sound of giant jaws powerfully crunching flesh and bones. From the odors that rose to the ape-man's sensitive nostrils he presently realized that beneath him was some huge reptile feeding upon the carcass of the lion that had been slain there earlier in the night.
As Tarzan's eyes, straining with curiosity, bored futilely into the dark shadows he felt a light touch upon his shoulder, and, turning, saw that his companion was attempting to attract his attention. The creature, pressing a forefinger to his own lips as to enjoin silence, attempted by pulling on Tarzan's arm to indicate that they should leave at once.
Realizing that he was in a strange country, evidently infested by creatures of titanic size, with the habits and powers of which he was entirely unfamiliar, the ape-man permitted himself to be drawn away. With the utmost caution the pithecanthropus descended the tree upon the opposite side from the great nocturnal prowler, and, closely followed by Tarzan, moved silently away through the night across the plain.
The ape-man was rather loath thus to relinquish an opportunity to inspect a creature which he realized was probably entirely different from anything in his past experience; yet he was wise enough to know when discretion was the better part of valor and now, as in the past, he yielded to that law which dominates the kindred of the wild, preventing them from courting danger uselessly, whose lives are sufficiently filled with danger in their ordinary routine of feeding and mating.
As the rising sun dispelled the shadows of the night, Tarzan found himself again upon the verge of a great forest into which his guide plunged, taking nimbly to the branches of the trees through which he made his way with the celerity of long habitude and hereditary instinct, but though aided by a prehensile tail, fingers, and toes, the man-thing moved through the forest with no greater ease or surety than did the giant ape-man.
It was during this journey that Tarzan recalled the wound in his side inflicted upon him the previous night by the raking talons of Numa, the lion, and examining it was surprised to discover that not only was it painless but along its edges were no indications of inflammation, the results doubtless of the antiseptic powder his strange companion had sprinkled upon it.
They had proceeded for a mile or two when Tarzan's companion came to earth upon a grassy slope beneath a great tree whose branches overhung a clear brook. Here they drank and Tarzan discovered the water to be not only deliciously pure and fresh but of an icy temperature that indicated its rapid descent from the lofty mountains of its origin.
Casting aside his loin cloth and weapons Tarzan entered the little pool beneath the tree and after a moment emerged, greatly refreshed and filled with a keen desire to breakfast. As he came out of the pool he noticed his companion examining him with a puzzled expression upon his face. Taking the ape-man by the shoulder he turned him around so that Tarzan's back was toward him and then, touching the end of Tarzan's spine with his forefinger, he curled his own tail up over his shoulder and, wheeling the ape-man about again, pointed first at Tarzan and then at his own caudal appendage, a look of puzzlement upon his face, the while he jabbered excitedly in his strange tongue.
The ape-man realized that probably for the first time his companion had discovered that he was tailless by nature rather than by accident, and so he called attention to his own great toes and thumbs to further impress upon the creature that they were of different species.
The fellow shook his head dubiously as though entirely unable to comprehend why Tarzan should differ so from him but at last, apparently giving the problem up with a shrug, he laid aside his own harness, skin, and weapons and entered the pool.
His ablutions completed and his meager apparel redonned he seated himself at the foot of the tree and motioning Tarzan to a place beside him, opened the pouch that hung at his right side taking from it strips of dried flesh and a couple of handfuls of thin-shelled nuts with which Tarzan was unfamiliar. Seeing the other break them with his teeth and eat the kernel, Tarzan followed the example thus set him, discovering the meat to be rich and well flavored. The dried flesh also was far from unpalatable, though it had evidently been jerked without salt, a commodity which Tarzan imagined might be rather difficult to obtain in this locality.
As they ate Tarzan's companion pointed to the nuts, the dried meat, and various other nearby objects, in each instance repeating what Tarzan readily discovered must be the names of these things in the creature's native language. The ape-man could but smile at this evident desire upon the part of his new-found acquaintance to impart to him instructions that eventually might lead to an exchange of thoughts between them. Having already mastered several languages and a multitude of dialects the ape-man felt that he could readily assimilate another even though this appeared one entirely unrelated to any with which he was familiar.
So occupied were they with their breakfast and the lesson that neither was aware of the beady eyes glittering down upon them from above; nor was Tarzan cognizant of any impending danger until the instant that a huge, hairy body leaped full upon his companion from the branches above them.
2
"To the Death!"
In the moment of discovery Tarzan saw that the creature was almost a counterpart of his companion in size and conformation, with the exception that his body was entirely clothed with a coat of shaggy black hair which almost concealed his features, while his harness and weapons were similar to those of the creature he had attacked. Ere Tarzan could prevent the creature had struck the ape-man's companion a blow upon the head with his knotted club that felled him, unconscious, to the earth; but before he could inflict further injury upon his defenseless prey the ape-man had closed with him.
Instantly Tarzan realized that he was locked with a creature of almost superhuman strength. The sinewy fingers of a powerful hand sought his throat while the other lifted the bludgeon above his head. But if the strength of the hairy attacker was great, great too was that of his smooth-skinned antagonist. Swinging a single terrific blow with clenched fist to the point of the other's chin, Tarzan momentarily staggered his assailant and then his own fingers closed upon the shaggy throat, as with the other hand he seized the wrist of the arm that swung the club. With equal celerity he shot his right leg behind the shaggy brute and throwing his weight forward hurled the thing over his hip heavily to the ground, at the same time precipitating his own body upon the other's chest.
With the shock of the impact the club fell from the brute's hand and Tarzan's hold was wrenched from its throat. Instantly the two were locked in a deathlike embrace. Though the creature bit at Tarzan the latter was quickly aware that this was not a particularly formidable method of offense or defense, since its canines were scarcely more developed than his own. The thing that he had principally to guard against was the sinuous tail which sought steadily to wrap itself about his throat and against which experience had afforded him no defense.
Struggling and snarling the two rolled growling about the sward at the foot of the tree, first one on top and then the other but each more occupied at present in defending his throat from the other's choking grasp than in aggressive, offensive tactics. But presently the ape-man saw his opportunity and as they rolled about he forced the creature closer and closer to the pool, upon the banks of which the battle was progressing. At last they lay upon the very verge of the water and now it remained for Tarzan to precipitate them both beneath the surface but in such a way that he might remain on top.
At the same instant there came within range of Tarzan's vision, just behind the prostrate form of his companion, the crouching, devil-faced figure of the striped saber-tooth hybrid, eyeing him with snarling, malevolent face.
Almost simultaneously Tarzan's shaggy antagonist discovered