For half the night he continued his search, until presently he was brought to a sudden halt by the distant sound of squealing thoats.
Guided by the noise of these habitually angry beasts, he stole forward through the trees until at last he came upon a level, treeless plain, in the centre of which a mighty city reared its burnished domes and vividly coloured towers.
About the walled city the red man saw a huge encampment of the green warriors of the dead sea-bottoms, and as he let his eyes rove carefully over the city he realized that here was no deserted metropolis of a dead past.
But what city could it be? His studies had taught him that in this little-explored portion of Barsoom the fierce tribe of Torquasian green men ruled supreme, and that as yet no red man had succeeded in piercing to the heart of their domain to return again to the world of civilization.
The men of Torquas had perfected huge guns with which their uncanny marksmanship had permitted them to repulse the few determined efforts that near-by red nations had made to explore their country by means of battle fleets of airships.
That he was within the boundary of Torquas, Carthoris was sure, but that there existed there such a wondrous city he never had dreamed, nor had the chronicles of the past even hinted at such a possibility, for the Torquasians were known to live, as did the other green men of Mars, within the deserted cities that dotted the dying planet, nor ever had any green horde built so much as a single edifice, other than the low-walled incubators where their young are hatched by the sun's heat.
The encircling camp of green warriors lay about five hundred yards from the city's walls. Between it and the city was no semblance of breastwork or other protection against rifle or cannon fire; yet distinctly now in the light of the rising sun Carthoris could see many figures moving along the summit of the high wall, and upon the roof tops beyond.
That they were beings like himself he was sure, though they were at too great distance from him for him to be positive that they were red men.
Almost immediately after sunrise the green warriors commenced firing upon the little figures upon the wall. To Carthoris' surprise the fire was not returned, but presently the last of the city's inhabitants had sought shelter from the weird marksmanship of the green men, and no further sign of life was visible beyond the wall.
Then Carthoris, keeping within the shelter of the trees that fringed the plain, began circling the rear of the besiegers' line, hoping against hope that somewhere he would obtain sight of Thuvia of Ptarth, for even now he could not believe that she was dead.
That he was not discovered was a miracle, for mounted warriors were constantly riding back and forth from the camp into the forest; but the long day wore on and still he continued his seemingly fruitless quest, until, near sunset, he came opposite a mighty gate in the city's western wall.
Here seemed to be the principal force of the attacking horde. Here a great platform had been erected whereon Carthoris could see squatting a huge green warrior, surrounded by others of his kind.
This, then, must be the notorious Hortan Gur, Jeddak of Torquas, the fierce old ogre of the south-western hemisphere, as only for a jeddak are platforms raised in temporary camps or upon the march by the green hordes of Barsoom.
As the Heliumite watched he saw another green warrior push his way forward toward the rostrum. Beside him he dragged a captive, and as the surrounding warriors parted to let the two pass, Carthoris caught a fleeting glimpse of the prisoner.
His heart leaped in rejoicing. Thuvia of Ptarth still lived!
It was with difficulty that Carthoris restrained the impulse to rush forward to the side of the Ptarthian princess; but in the end his better judgment prevailed, for in the face of such odds he knew that he should have been but throwing away, uselessly, any future opportunity he might have to succour her.
He saw her dragged to the foot of the rostrum. He saw Hortan Gur address her. He could not hear the creature's words, nor Thuvia's reply; but it must have angered the green monster, for Carthoris saw him leap toward the prisoner, striking her a cruel blow across the face with his metal-banded arm.
Then the son of John Carter, Jeddak of Jeddaks, Warlord of Barsoom, went mad. The old, blood-red haze through which his sire had glared at countless foes, floated before his eyes.
His half-Earthly muscles, responding quickly to his will, sent him in enormous leaps and bounds toward the green monster that had struck the woman he loved.
The Torquasians were not looking in the direction of the forest. All eyes had been upon the figures of the girl and their jeddak, and loud was the hideous laughter that rang out in appreciation of the wit of the green emperor's reply to his prisoner's appeal for liberty.
Carthoris had covered about half the distance between the forest and the green warriors, when a new factor succeeded in still further directing the attention of the latter from him.
Upon a high tower within the beleaguered city a man appeared. From his upturned mouth there issued a series of frightful shrieks; uncanny shrieks that swept, shrill and terrifying, across the city's walls, over the heads of the besiegers, and out across the forest to the uttermost confines of the valley.
Once, twice, thrice the fearsome sound smote upon the ears of the listening green men and then far, far off across the broad woods came sharp and clear from the distance an answering shriek.
It was but the first. From every point rose similar savage cries, until the world seemed to tremble to their reverberations.
The green warriors looked nervously this way and that. They knew not fear, as Earth men may know it; but in the face of the unusual their wonted self-assurance deserted them.
And then the great gate in the city wall opposite the platform of Hortan Gur swung suddenly wide. From it issued as strange a sight as Carthoris ever had witnessed, though at the moment he had time to cast but a single fleeting glance at the tall bowmen emerging through the portal behind their long, oval shields; to note their flowing auburn hair; and to realize that the growling things at their side were fierce Barsoomian lions.
Then he was in the midst of the astonished Torquasians. With drawn long-sword he was among them, and to Thuvia of Ptarth, whose startled eyes were the first to fall upon him, it seemed that she was looking upon John Carter himself, so strangely similar to the fighting of the father was that of the son.
Even to the famous fighting smile of the Virginian was the resemblance true. And the sword arm! Ah, the subtleness of it, and the speed!
All about was turmoil and confusion. Green warriors were leaping to the backs of their restive, squealing thoats. Calots were growling out their savage gutturals, whining to be at the throats of the oncoming foemen.
Thar Ban and another by the side of the rostrum had been the first to note the coming of Carthoris, and it was with them he battled for possession of the red girl, while the others hastened to meet the host advancing from the beleaguered city.
Carthoris sought both to defend Thuvia of Ptarth and reach the side of the hideous Hortan Gur that he might avenge the blow the creature had struck the girl.
He succeeded in reaching the rostrum, over the dead bodies of two warriors who had turned to join Thar Ban and his companion in repulsing this adventurous red man, just as Hortan Gur was about to leap from it to the back of his thoat.
The attention of the green warriors turned principally upon the bowmen advancing upon them from the city, and upon the savage banths that paced beside them-cruel beasts of war, infinitely more terrible than their own savage calots.
As Carthoris leaped to the rostrum he drew Thuvia up beside him, and then he turned upon the departing jeddak with an angry challenge and a sword thrust.
As the Heliumite's point pricked his green hide, Hortan Gur turned upon his adversary with a snarl, but at the same instant two of his chieftains called to him to hasten, for the charge of the fair-skinned inhabitants of the city was developing into a more serious matter than the Torquasians had anticipated.
Instead of remaining to battle with the red man, Hortan Gur promised him his attention after he had disposed of the presumptuous citizens of the walled city, and, leaping astride his thoat, galloped off to meet the rapidly advancing bowmen.
The other warriors quickly followed their jeddak, leaving Thuvia and Carthoris alone upon the platform.
Between them and the city raged a terrific battle. The fair-skinned warriors, armed only with their long bows
