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 the menacing figure of the great cat. Immediately he ceased his belligerent activities against Tarzan and, jabbering and chattering to the ape-man, he tried to disengage himself from Tarzan's hold but in such a way that indicated that as far as he was concerned their battle was over. Appreciating the danger to his unconscious companion and being anxious to protect him from the saber-tooth the ape-man relinquished his hold upon his adversary and together the two rose to their feet. Drawing his knife Tarzan moved slowly toward the body of his companion, expecting that his recent antagonist would grasp the opportunity for escape. To his surprise, however, the beast, after regaining its club, advanced at his side. The great cat, flattened upon its belly, remained motionless except for twitching tail and snarling lips where it lay perhaps fifty feet beyond the body of the pithecanthropus. As Tarzan stepped over the body of the latter he saw the eyelids quiver and open, and in his heart he felt a strange sense of relief that the creature was not dead and a realization that without his suspecting it there had arisen within his savage bosom a bond of attachment for this strange new friend. Tarzan continued to approach the saber-tooth, nor did the shaggy beast at his right lag behind. Closer and closer they came until at a distance of about twenty feet the hybrid charged. Its rush was directed toward the shaggy manlike ape who halted in his tracks with upraised bludgeon to meet the assault. Tarzan, on the contrary, leaped forward and with a celerity second not even to that of the swift-moving cat, he threw himself headlong upon him as might a Rugby tackler on an American gridiron. His right arm circled the beast's neck in front of the right shoulder, his left behind the left foreleg, and so great was the force of the impact that the two rolled over and over several times upon the ground, the cat screaming and clawing to liberate itself that it might turn upon its attacker, the man clinging desperately to his hold.