horny spine, was equipped with two other such spines upon the upper side and toward the tip. Each of these spines was about three feet in length. The creature walked upon four lizard-like feet, its short, front legs bringing its nose close to the ground, imparting to it an awkward and ungainly appearance.
It appeared to be watching the man in the canyon, and suddenly, to Jason's amazement, it gathered its gigantic hind legs beneath it and launched itself straight from the top of the lofty cliff.
Jason's first thought was that the gigantic creature would be dashed to pieces upon the ground in the canyon bottom, but to his vast astonishment he saw that it was not falling but was gliding swiftly through the air, supported by its huge spinal plates, which it had dropped to a horizontal position, transforming itself into a gigantic animate glider.
The swish of its passage through the air attracted the attention of the warrior squatting over his fire. The man leaped to his feet, snatching up his spear as he did so, and simultaneously Jason Gridley sprang over the edge of the cliff and leaped down the rough declivity toward the lone warrior, at the same time whipping both his six- guns from their holsters.
XI THE CAVERN OF CLOVI
AS TARZAN swarmed up the rope the bear, almost upon his heels and running swiftly, squatted upon its haunches to overcome its momentum and came to a stop directly beneath him. And then it was that there occurred one of those unforeseen accidents which no one might have guarded against.
It chanced that the granite projection across which Tarzan had cast his noose was at a single point of knife- like sharpness upon its upper edge, and with the weight of the man dragging down upon it the rope parted where it rested upon this sharp bit of granite, and the Lord of the Jungle was precipitated upon the back of the cave bear.
With such rapidity had these events transpired it is a matter of question as to whether the bear or Tarzan was the more surprised, but primitive creatures who would survive cannot permit surprise to disconcert them. In this instance both of the creatures accepted the happening as though it had been planned and expected.
The bear reared up and shook itself in an effort to dislodge the man-thing from its back, while Tarzan slipped a bronzed arm around the shaggy neck and clung desperately to his hold while he dragged his hunting knife from its sheath. It was a precarious place in which to stage a struggle for life. On one side the cliff rose far above them, and upon the other it dropped away dizzily into the depth of a gloomy gorge, and here the efforts of the cave bear to dislodge its antagonist momentarily bade fair to plunge them both into eternity.
The growls and roars of the quadruped reverberated among the mighty peaks of the Mountains of the Thipdars, but the ape-man battled silently, driving his blade repeatedly into the back of the lunging beast, which was seeking by every means at its command to dislodge him, though ever wary against precipitating itself over the brink into the chasm.
But the battle could not go on forever and at last the blade found the spinal cord. The creature stiffened spasmodically and Tarzan slipped quickly from its back. He found safe footing upon the ledge as the mighty carcass stumbled forward and rolled over the edge to hurtle downward to the gorge's bottom, carrying with it four of Tarzan's arrows and his spear.
The ape-man found his rope lying upon the ledge where it had fallen, and gathering it up he started back along the trail in search of the bow that he had been forced to discard in his flight, as well as to find the boy.
He had taken only a few steps when, upon rounding the shoulder of a crag, he came face to face with the youth. At sight of him the latter stopped, his spear ready, his stone knife loosened in its sheath. He had been carrying Tarzan's bow, but at sight of the ape-man he dropped it at his feet, the better to defend himself in the event that he was attacked by the stranger.
'I am Tarzan of the Apes,' said the Lord of the Jungle. 'I come as a friend, and not to kill.'
'I am Ovan,' said the boy. 'If you did not come to our country to kill, then you came to steal a mate, and thus it is the duty of every warrior of Clovi to kill you.'
'Tarzan seeks no mate,' said the ape-man.
'Then why is he in Clovi?' demanded the youth.
'He is lost,' replied the ape-man. 'Tarzan comes from another world that is beyond Pellucidar. He has become separated from his friends and he cannot find his way back to them. He would be friend with the people of Clovi.'
'Why did you attack the bear?' demanded Ovan, suddenly.
'If I had not attacked it it would have killed you,' replied the ape-man.
Ovan scratched his head. 'It seemed to me,' he said presently, 'that there could be no other reason. It is what one of the men of my own tribe would have done, but you are not of my tribe. You are an enemy and so I could not understand why you did it. Do you tell me that though I am not of your tribe you would have saved my life?'
'Certainly,' replied Tarzan.
Ovan looked long and steadily at the handsome giant standing before him. 'I believe you,' he said presently, 'although I do not understand. I never heard of such a thing before, but I do not know that the men of my tribe will believe. Even after I have told them what you have done for me they may still wish to kill you, for they believe that it is never safe to trust an enemy.'
'Where is your village?' asked Tarzan.
'It is not at a great distance,' replied Ovan.
'I will go there with you,' said Tarzan, 'and talk with your chief.'
'Very well,' said the boy. 'You may talk with Avan the chief. He is my father. And if they decide to kill you I shall try to help you, for you saved my life when the ryth would have destroyed me.'
'Why were you in the cave?' demanded Tarzan. 'It was plainly apparent that it was the den of a wild beast.'
'You, too, were upon the same trail,' said the boy, 'while you chanced to be behind the ryth. It was my misfortune that I was in front of it.'
'I did not know where the trail led,' said the ape-man.
'Neither did I,' said Ovan. 'I have never hunted before except in the company of older men, but now I have reached an age when I would be a warrior myself, and so I have come out of the caves of my people to make my first kill alone, for only thus may a man hope to become a warrior. I saw this trail and, though I did not know where it led, I followed it; nor had I been long upon it when I heard the footsteps of the ryth behind me and when I came to the cave and saw that the trail ended there, I knew that I should never again see the caves of my people, that I should never become a warrior. When the great ryth came and saw me standing there he was very angry, but I should have fought him. Perhaps I might have killed him, though I do not believe that that is at all likely.
'And then you came and with this bent stick cast a little spear into the back of the ryth, which so enraged him that he forgot me and turned to pursue you as you knew that he would. They must indeed be brave warriors who come from the land from which you come. Tell me about your country. Where is it? Are your warriors great hunters and is your chief powerful in the land?'
Tarzan tried to explain that his country was not in Pellucidar, but that was beyond Ovan's powers of conception, and so Tarzan turned the conversation from himself to the youth and as they followed a winding trail toward Clovi, Ovan discoursed upon the bravery of the men of his tribe and the beauty of its women.
'Avan, my father, is a great chief,' he said, 'and the men of my tribe are mighty warriors. Often we battle with the men of Zoram and we have even gone as far as Daroz, which lies beyond Zoram, for always there are more men than women in our tribe and the warriors must seek their mates in Zoram and Daroz. Even now Garb has gone to Zoram with twenty warriors to steal women. The women of Zoram are very beautiful. When I am a little larger I shall go to Zoram and steal a mate.'
'How far is it from Clovi to Zoram?' asked Tarzan.
'Some say that it is not so far, and others that it is farther,' replied Ovan. 'I have heard it said that going to Zoram is much farther than returning inasmuch as the warriors usually eat six times on the journey from Clovi to Zoram, but returning a strong man may make the journey eating only twice and still retain his strength.'
