Downward along a smooth, broad floor led the strange tunnel, for such Carthoris was now convinced was the nature of the shaft he at first had thought but a cave.
Before him he could hear the occasional low moans of the banth, and presently from behind came a similar uncanny note.
Another banth had entered the passageway on HIS trail!
His position was anything but pleasant. His eyes could not penetrate the darkness even to the distinguishing of his hand before his face, while the banths, he knew, could see quite well, though absence of light were utter.
No other sounds came to his ears than the dismal, bloodthirsty moanings of the beast ahead and the beast behind.
The tunnel had led straight, from where he had entered it beneath the side of the rock furthest from the unscaleable cliffs, toward the mighty barrier that had baffled him so long.
Now it was running almost level, and presently he noted a gradual ascent.
The beast behind him was gaining upon him, crowding him perilously close upon the heels of the beast in front.
Presently he should have to do battle with one, or both.
More firmly he gripped his weapon.
Now he could hear the breathing of the banth at his heels.
Not for much longer could he delay the encounter.
Long since he had become assured that the tunnel led beneath the cliffs to the opposite side of the barrier, and he had hoped that he might reach the moonlit open before being compelled to grapple with either of the monsters.
The sun had been setting as he entered the tunnel, and the way had been sufficiently long to assure him that darkness now reigned upon the world without.
He glanced behind him. Blazing out of the darkness, seemingly not ten paces behind, glared two flaming points of fire. As the savage eyes met his, the beast emitted a frightful roar and then he charged.
To face that savage mountain of onrushing ferocity, to stand unshaken before the hideous fangs that he knew were bared in slavering blood-thirstiness, though he could not see them, required nerves of steel; but of such were the nerves of Carthoris of Helium.
He had the brute's eyes to guide his point, and, as true as the sword hand of his mighty sire, his guided the keen point to one of those blazing orbs, even as he leaped lightly to one side.
With a hideous scream of pain and rage, the wounded banth hurtled, clawing, past him. Then it turned to charge once more; but this time Carthoris saw but a single gleaming point of fiery hate directed upon him.
Again the needle point met its flashing target. Again the horrid cry of the stricken beast reverberated through the rocky tunnel, shocking in its torture-laden shrillness, deafening in its terrific volume.
But now, as it turned to charge again, the man had no guide whereby to direct his point.
He heard the scraping of the padded feet upon the rocky floor.
He knew the thing was charging down upon him once again, but he could see nothing.
Yet, if he could not see his antagonist, neither could his antagonist now see him.
Leaping, as he thought, to the exact centre of the tunnel, he held his sword point ready on a line with the beast's chest. It was all that he could do, hoping that chance might send the point into the savage heart as he went down beneath the great body.
So quickly was the thing over that Carthoris could scarce believe his senses as the mighty body rushed madly past him. Either he had not placed himself in the centre of the tunnel, or else the blinded banth had erred in its calculations.
However, the huge body missed him by a foot, and the creature continued on down the tunnel as though in pursuit of the prey that had eluded him.
Carthoris, too, followed the same direction, nor was it long before his heart was gladdened by the sight of the moonlit exit from the long, dark passage.
Before him lay a deep hollow, entirely surrounded by gigantic cliffs. The surface of the valley was dotted with enormous trees, a strange sight so far from a Martian waterway.
The ground itself was clothed in brilliant scarlet sward, picked out with innumerable patches of gorgeous wild flowers.
Beneath the glorious effulgence of the two moons the scene was one of indescribable loveliness, tinged with the weirdness of strange enchantment.
For only an instant, however, did his gaze rest upon the natural beauties outspread before him. Almost immediately they were riveted upon the figure of a great banth standing across the carcass of a new-killed thoat.
The huge beast, his tawny mane bristling around his hideous head, kept his eyes fixed upon another banth that charged erratically hither and thither, with shrill screams of pain, and horrid roars of hate and rage.
Carthoris quickly guessed that the second brute was the one he had blinded during the fight in the tunnel, but it was the dead thoat that centred his interest more than either of the savage carnivores.
The harness was still upon the body of the huge Martian mount, and Carthoris could not doubt but that this was the very animal upon which the green warrior had borne away Thuvia of Ptarth.
But where were the rider and his prisoner? The Prince of Helium shuddered as he thought upon the probability of the fate that had overtaken them.
Human flesh is the food most craved by the fierce Barsoomian lion, whose great carcass and giant thews require enormous quantities of meat to sustain them.
Two human bodies would have but whetted the creature's appetite, and that he had killed and eaten the green man and the red girl seemed only too likely to Carthoris. He had left the carcass of the mighty thoat to be devoured after having consumed the more tooth-some portion of his banquet.
Now the sightless banth, in its savage, aimless charging and counter-charging, had passed beyond the kill of its fellow, and there the light breeze that was blowing wafted the scent of new blood to its nostrils.