CHAPTER I

CARTHORIS AND THUVIA

Upon a massive bench of polished ersite beneath the gorgeous blooms of a giant pimalia a woman sat. Her shapely, sandalled foot tapped impatiently upon the jewel-strewn walk that wound beneath the stately sorapus trees across the scarlet sward of the royal gardens of Thuvan Dihn, Jeddak of Ptarth, as a dark-haired, red— skinned warrior bent low toward her, whispering heated words close to her ear.

"Ah, Thuvia of Ptarth," he cried, "you are cold even before the fiery blasts of my consuming love! No harder than your heart, nor colder is the hard, cold ersite of this thrice happy bench which supports your divine and fadeless form! Tell me, O Thuvia of Ptarth, that I may still hope-that though you do not love me now, yet some day, some day, my princess, I-"

The girl sprang to her feet with an exclamation of surprise and displeasure. Her queenly head was poised haughtily upon her smooth red shoulders. Her dark eyes looked angrily into those of the man.

"You forget yourself, and the customs of Barsoom, Astok," she said. "I have given you no right thus to address the daughter of Thuvan Dihn, nor have you won such a right."

The man reached suddenly forth and grasped her by the arm.

"You shall be my princess!" he cried. "By the breast of Issus, thou shalt, nor shall any other come between Astok, Prince of Dusar, and his heart`s desire. Tell me that there is another, and I shall cut out his foul heart and fling it to the wild calots of the dead sea-bottoms!"

At touch of the man`s hand upon her flesh the girl went pallid beneath her coppery skin, for the persons of the royal women of the courts of Mars are held but little less than sacred. The act of Astok, Prince of Dusar, was profanation. There was no terror in the eyes of Thuvia of Ptarth-only horror for the thing the man had done and for its possible consequences.

"Release me." Her voice was level-frigid.

The man muttered incoherently and drew her roughly toward him.

"Release me!" she repeated sharply, "or I call the guard, and the Prince of Dusar knows what that will mean."

Quickly he threw his right arm about her shoulders and strove to draw her face to his lips. With a little cry she struck him full in the mouth with the massive bracelets that circled her free arm.

"Calot!" she exclaimed, and then: "The guard! The guard! Hasten in protection of the Princess of Ptarth!"

In answer to her call a dozen guardsmen came racing across the scarlet sward, their gleaming long-swords naked in the sun, the metal of their accoutrements clanking against that of their leathern harness, and in their throats hoarse shouts of rage at the sight which met their eyes.

But before they had passed half across the royal garden to where Astok of Dusar still held the struggling girl in his grasp, another figure sprang from a cluster of dense foliage that half hid a golden fountain close at hand. A tall, straight youth he was, with black hair and keen grey eyes; broad of shoulder and narrow of hip; a clean-limbed fighting man. His skin was but faintly tinged with the copper colour that marks the red men of Mars from the other races of the dying planet-he was like them, and yet there was a subtle difference greater even than that which lay in his lighter skin and his grey eyes.

There was a difference, too, in his movements. He came on in great leaps that carried him so swiftly over the ground that the speed of the guardsmen was as nothing by comparison.

Astok still clutched Thuvia`s wrist as the young warrior confronted him. The new-comer wasted no time and he spoke but a single word.

"Calot!" he snapped, and then his clenched fist landed beneath the other`s chin, lifting him high into the air and depositing him in a crumpled heap within the centre of the pimalia bush beside the ersite bench.

Her champion turned toward the girl. "Kaor, Thuvia of Ptarth!" he cried. "It seems that fate timed my visit well."

"Kaor, Carthoris of Helium!" the princess returned the young man`s greeting, "and what less could one expect of the son of such a sire?"

He bowed his acknowledgment of the compliment to his father, John Carter, Warlord of Mars. And then the guardsmen, panting from their charge, came up just as the Prince of Dusar, bleeding at the mouth, and with drawn sword, crawled from the entanglement of the pimalia.

Astok would have leaped to mortal combat with the son of Dejah Thoris, but the guardsmen pressed about him, preventing, though it was clearly evident that naught would have better pleased Carthoris of Helium.

"But say the word, Thuvia of Ptarth," he begged, "and naught will give me greater pleasure than meting to this fellow the punishment he has earned."

"It cannot be, Carthoris," she replied. "Even though he has forfeited all claim upon my consideration, yet is he the guest of the jeddak, my father, and to him alone may he account for the unpardonable act he has committed."

"As you say, Thuvia," replied the Heliumite. "But afterward he shall account to Carthoris, Prince of Helium, for this affront to the daughter of my father`s friend." As he spoke, though, there burned in his eyes a fire that proclaimed a nearer, dearer cause for his championship of this glorious daughter of Barsoom.

The maid`s cheek darkened beneath the satin of her transparent skin, and the eyes of Astok, Prince of Dusar, darkened, too, as he read that which passed unspoken between the two in the royal gardens of the jeddak.

"And thou to me," he snapped at Carthoris, answering the young man`s challenge.

The guard still surrounded Astok. It was a difficult position for the young officer who commanded it. His prisoner was the son of a mighty jeddak; he was the guest of Thuvan Dihn-until but now an honoured guest upon whom every royal dignity had been showered. To arrest him forcibly could mean naught else than war, and yet he had done that which in the eyes of the Ptarth warrior merited death.

The young man hesitated. He looked toward his princess. She, too, guessed all that hung upon the action of the coming moment. For many years Dusar and Ptarth had been at peace with each other. Their great merchant ships plied back and forth between the larger cities of the two nations. Even now, far above the gold-shot scarlet dome of the jeddak`s palace, she could see the huge bulk of a giant freighter taking its majestic way through the thin Barsoomian air toward the west and Dusar.

By a word she might plunge these two mighty nations into a bloody conflict that would drain them of their bravest blood and their incalculable riches, leaving them all helpless against the inroads of their envious and less powerful neighbors, and at last a prey to the savage green hordes of the dead sea-bottoms.

No sense of fear influenced her decision, for fear is seldom known to the children of Mars. It was rather a sense of the responsibility that she, the daughter of their jeddak, felt for the welfare of her father`s people.

"I called you, Padwar," she said to the lieutenant of the guard, "to protect the person of your princess, and to keep the peace that must not be violated within the royal gardens of the jeddak. That is all. You will escort me to the palace, and the Prince of Helium will accompany me."

Without another glance in the direction of Astok she turned, and taking Carthoris` proffered hand, moved slowly toward the massive marble pile that housed the ruler of Ptarth and his glittering court. On either side marched a file of guardsmen. Thus Thuvia of Ptarth found a way out of a dilemma, escaping the necessity of placing her father`s royal guest under forcible restraint, and at the same time separating the two princes, who otherwise would have been at each other`s throat the moment she and the guard had departed.

Beside the pimalia stood Astok, his dark eyes narrowed to mere slits of hate beneath his lowering brows as he watched the retreating forms of the woman who had aroused the fiercest passions of his nature and the man whom he now believed to be the one who stood between his love and its consummation.

As they disappeared within the structure Astok shrugged his shoulders, and with a murmured oath crossed the gardens toward another wing of the building where he and his retinue were housed.

That night he took formal leave of Thuvan Dihn, and though no mention was made of the happening within the garden, it was plain to see through the cold mask of the jeddak`s courtesy that only the customs of royal hospitality restrained him from voicing the contempt he felt for the Prince of Dusar.

Carthoris was not present at the leave-taking, nor was Thuvia. The ceremony was as stiff and formal as court etiquette could make it, and when the last of the Dusarians clambered over the rail of the battleship that had brought them upon this fateful visit to the court of Ptarth, and the mighty engine of destruction had risen slowly from the ways of the landing-stage, a note of relief was apparent in the voice of Thuvan Dihn as he turned to one of his officers with a word of comment upon a subject foreign to that which had been uppermost in the minds of all for hours.

But, after all, was it so foreign?

"Inform Prince Sovan," he directed, "that it is our wish that the fleet which departed for Kaol this morning be recalled to cruise to the west of Ptarth."

As the warship, bearing Astok back to the court of his father, turned toward the west, Thuvia of Ptarth, sitting upon the same bench where the Prince of Dusar had affronted her, watched the twinkling lights of the craft growing smaller in the distance. Beside her, in the brilliant light of the nearer moon, sat Carthoris. His eyes were not upon the dim bulk of the battleship, but on the profile of the girl`s upturned face.

"Thuvia," he whispered.

The girl turned her eyes toward his. His hand stole out to find hers, but she drew her own gently away.

"Thuvia of Ptarth, I love you!" cried the young warrior. "Tell me that it does not offend."

She shook her head sadly. "The love of Carthoris of Helium," she said simply, "could be naught but an honour to any woman; but you must not speak, my friend, of bestowing upon me that which I may not reciprocate."

The young man got slowly to his feet. His eyes were wide in astonishment. It never had occurred to the Prince of Helium that Thuvia of Ptarth might love another.

"But at Kadabra!" he exclaimed. "And later here at your father`s court, what did you do, Thuvia of Ptarth, that might have warned me that you could not return my love?"

"And what did I do, Carthoris of Helium," she returned, "that might lead you to believe that I DID return it?"

He paused in thought, and then shook his head. "Nothing, Thuvia, that is true; yet I could have sworn you loved me. Indeed, you well knew how near to worship has been my love for you."

"And how might I know it, Carthoris?" she asked innocently. "Did you ever tell me as much? Ever before have words of love for me fallen from your lips?"

"But you MUST have known it!" he exclaimed. "I am like my father-witless in matters of the heart, and of a poor way with women; yet the jewels that strew these royal garden paths-the trees, the flowers, the sward— all must have read the love that has filled my heart since first my eyes were made new by imaging your perfect face and form; so how could you alone have been blind to it?"

"Do the maids of Helium pay court to their men?" asked Thuvia.

"You are playing with me!" exclaimed Carthoris. "Say that you are but playing, and that after all you love me, Thuvia!"

"I cannot tell you that, Carthoris, for I am promised to another."

Her tone was level, but was there not within it the hint of an infinite depth of sadness? Who may say?

"Promised to another?" Carthoris scarcely breathed the words. His face went almost white, and then his head came up as befitted him in whose veins flowed the blood of the overlord of a world.

"Carthoris of Helium wishes you every happiness with the man of your choice," he said. "With-" and then he hesitated, waiting for her to fill in the name.

"Kulan Tith, Jeddak of Kaol," she replied. "My father`s friend and Ptarth`s most puissant ally."

The young man looked at her intently for a moment before he spoke again.

"You love him, Thuvia of Ptarth?" he asked.

"I am promised to him," she replied simply.

He did not press her. "He is of Barsoom`s noblest blood and mightiest fighters," mused Carthoris. "My father`s friend and mine-would that it might have been another!" he muttered almost savagely. What the girl thought was hidden by the mask of her expression, which was tinged only by a little shadow of sadness that might have been for Carthoris, herself, or for them both.

Carthoris of Helium did not ask, though he noted it, for his loyalty to Kulan Tith was the loyalty of the blood of John Carter of Virginia for a friend, greater than which could be no loyalty.

He raised a jewel-encrusted bit of the girl`s magnificent trappings to his lips.

"To the honour and happiness of Kulan Tith and the priceless jewel that has been bestowed upon him," he said, and though his voice was husky there was the true ring of sincerity in it. "I told you that I loved you, Thuvia, before I knew that you were promised to another. I may not tell you it again, but I am glad that you know it, for there is no dishonour in it either to you or to Kulan Tith or to myself. My love is such that it may embrace as well Kulan Tith-if you love him." There was almost a question in the statement.

"I am promised to him," she replied.

Carthoris backed slowly away. He laid one hand upon his heart, the other upon the pommel of his long-sword.

"These are yours-always," he said. A moment later he had entered the palace, and was gone from the girl`s sight.

Had he returned at once he would have found her prone upon the ersite bench, her face buried in her arms. Was she weeping? There was none to see.

Carthoris of Helium had come all unannounced to the court of his father`s friend that day. He had come alone in a small flier, sure of the same welcome that always awaited him at Ptarth. As there had been no formality in his coming there was no need of formality in his going.

To Thuvan Dihn he explained that he had been but testing an invention of his own with which his flier was equipped-a clever improvement of the ordinary Martian air compass, which, when set for a certain destination, will remain constantly fixed thereon, making it only necessary to keep a vessel`s prow always in the direction of the compass needle to reach any given point upon Barsoom by the shortest route.

Carthoris` improvement upon this consisted of an auxiliary device which steered the craft mechanically in the direction of the compass, and upon arrival directly over the point for which the compass was set, brought the craft to a standstill and lowered it, also automatically, to the ground.

"You readily discern the advantages of this invention," he was saying to Thuvan Dihn, who had accompanied him to the landing-stage upon the palace roof to inspect the compass and bid his young friend farewell.

A dozen officers of the court with several body servants were grouped behind the jeddak and his guest, eager listeners to the conversation-so eager on the part of one of the servants that he was twice rebuked by a noble for his forwardness in pushing himself ahead of his betters to view the intricate mechanism of the wonderful "controlling destination compass," as the thing was called.

"For example," continued Carthoris, "I have an all— night trip before me, as to-night. I set the pointer here upon the right-hand dial which represents the eastern hemisphere of Barsoom, so that the point rests upon the exact latitude and longitude of Helium. Then I start the engine, roll up in my sleeping silks and furs, and with lights burning, race through the air toward Helium, confident that at the appointed hour I shall drop gently toward the landing-stage upon my own palace, whether I am still asleep or no."

"Provided," suggested Thuvan Dihn, "you do not chance to collide with some other night wanderer in the meanwhile."

Carthoris smiled. "No danger of that," he replied. "See here," and he indicated a device at the right of the destination compass. "This is my `obstruction evader,` as I call it. This visible device is the switch which throws the mechanism on or off. The instrument itself is below deck, geared both to the steering apparatus and the control levers.

"It is quite simple, being nothing more than a radium generator diffusing radio-activity in all directions to a distance of a hundred yards or so from the flier. Should this enveloping force be interrupted in any direction a delicate instrument immediately apprehends the irregularity, at the same time imparting an impulse to a magnetic device which in turn actuates the steering mechanism, diverting the bow of the flier away from the obstacle until the craft`s radio-activity sphere is no longer in contact with the obstruction, then she falls once more into her normal course. Should the disturbance approach from the rear, as in case of a faster-moving craft overhauling me, the mechanism actuates the speed control as well as the steering gear, and the flier shoots ahead and either up or down, as the oncoming vessel is upon a lower or higher plane than herself.

"In aggravated cases, that is when the obstructions are many, or of such a nature as to deflect the bow more than forty-five degrees in any direction, or when the craft has reached its destination and dropped to within a hundred yards of the ground, the mechanism brings her to a full stop, at the same time sounding a loud alarm which will instantly awaken the pilot. You see I have anticipated almost every contingency."

Thuvan Dihn smiled his appreciation of the marvellous device. The forward servant pushed almost to the flier`s side. His eyes were narrowed to slits.

"All but one," he said.

The nobles looked at him in astonishment, and one of them grasped the fellow none too gently by the shoulder to push him back to his proper place. Carthoris raised his hand.

"Wait," he urged. "Let us hear what the man has to say-no creation of mortal mind is perfect. Perchance he has detected a weakness that it will be well to know at once. Come, my good fellow, and what may be the one contingency I have overlooked?"

As he spoke Carthoris observed the servant closely for the first time. He saw a man of giant stature and handsome, as are all those of the race of Martian red men; but the fellow`s lips were thin and cruel, and across one cheek was the faint, white line of a sword-cut from the right temple to the corner of the mouth.

"Come," urged the Prince of Helium. "Speak!"

The man hesitated. It was evident that he regretted the temerity that had made him the centre of interested observation. But at last, seeing no alternative, he spoke.

"It might be tampered with," he said, "by an enemy."

Carthoris drew a small key from his leathern pocket-pouch.

"Look at this," he said, handing it to the man. "If you know aught of locks, you will know that the mechanism which this unlooses is beyond the cunning of a picker of locks. It guards the vitals of the instrument from crafty tampering. Without it an enemy must half wreck the device to reach its heart, leaving his handiwork apparent to the most casual observer."

The servant took the key, glanced at it shrewdly, and then as he made to return it to Carthoris dropped it upon the marble flagging. Turning to look for it he planted the sole of his sandal full upon the glittering object. For an instant he bore all his weight upon the foot that covered the key, then he stepped back and with an exclamation as of pleasure that he had found it, stooped, recovered it, and returned it to the Heliumite. Then he dropped back to his station behind the nobles and was forgotten.

A moment later Carthoris had made his adieux to Thuvan Dihn and his nobles, and with lights twinkling had risen into the star-shot void of the Martian night.

CHAPTER II

SLAVERY

As the ruler of Ptarth, followed by his courtiers, descended from the landing-stage above the palace, the servants dropped into their places in the rear of their royal or noble masters, and behind the others one lingered to the last. Then quickly stooping he snatched the sandal from his right foot, slipping it into his pocket-pouch.

When the party had come to the lower levels, and the jeddak had dispersed them by a sign, none noticed that the forward fellow who had drawn so much attention to himself before the Prince of Helium departed, was no longer among the other servants.

To whose retinue he had been attached none had thought to inquire, for the followers of a Martian noble are many, coming and going at the whim of their master, so that a new face is scarcely ever questioned, as the fact that a man has passed within the palace walls is considered proof positive that his loyalty to the jeddak is beyond question, so rigid is the examination of each who seeks service with the nobles of the court.

A good rule that, and only relaxed by courtesy in favour of the retinue of visiting royalty from a friendly foreign power.

It was late in the morning of the next day that a giant serving man in the harness of the house of a great Ptarth noble passed out into the city from the palace gates. Along one broad avenue and then another he strode briskly until he had passed beyond the district of the nobles and had come to the place of shops. Here he sought a pretentious building that rose spire-like toward the heavens, its outer walls elaborately wrought with delicate carvings and intricate mosaics.

It was the Palace of Peace in which were housed the representatives of the foreign powers, or rather in which were located their embassies; for the ministers themselves dwelt in gorgeous palaces within the district occupied by the nobles.

Here the man sought the embassy of Dusar. A clerk arose questioningly as he entered, and at his request to have a word with the minister asked his credentials. The visitor slipped a plain metal armlet from above his elbow, and pointing to an inscription upon its inner surface, whispered a word or two to the clerk.

The latter`s eyes went wide, and his attitude turned at once to one of deference. He bowed the stranger to a seat, and hastened to an inner room with the armlet in his hand. A moment later he reappeared and conducted the caller into the presence of the minister.

For a long time the two were closeted together, and when at last the giant serving man emerged from the inner office his expression was cast in a smile of sinister satisfaction. From the Palace of Peace he hurried directly to the palace of the Dusarian minister.

That night two swift fliers left the same palace top. One sped its rapid course toward Helium; the other-

Thuvia of Ptarth strolled in the gardens of her father`s palace, as was her nightly custom before retiring. Her silks and furs were drawn about her, for the air of Mars is chill after the sun has taken his quick plunge beneath the planet`s western verge.

The girl`s thoughts wandered from her impending nuptials, that would make her empress of Kaol, to the person of the trim young Heliumite who had laid his heart at her feet the preceding day.

Whether it was pity or regret that saddened her expression as she gazed toward the southern heavens where she had watched the lights of his flier disappear the previous night, it would be difficult to say.

So, too, is it impossible to conjecture just what her emotions may have been as she discerned the lights of a flier speeding rapidly out of the distance from that very direction, as though impelled toward her garden by the very intensity of the princess` thoughts.

She saw it circle lower above the palace until she was positive that it but hovered in preparation for a landing.

Presently the powerful rays of its searchlight shot downward from the bow. They fell upon the landing-stage for a brief instant, revealing the figures of the Ptarthian guard, picking into brilliant points of fire the gems upon their gorgeous harnesses.

Then the blazing eye swept onward across the burnished domes and graceful minarets, down into court and park and garden to pause at last upon the ersite bench and the girl standing there beside it, her face upturned full toward the flier.

For but an instant the searchlight halted upon Thuvia of Ptarth, then it was extinguished as suddenly as it had come to life. The flier passed on above her to disappear beyond a grove of lofty skeel trees that grew within the palace grounds.

The girl stood for some time as it had left her, except that her head was bent and her eyes downcast in thought.

Who but Carthoris could it have been? She tried to feel anger that he should have returned thus, spying upon her; but she found it difficult to be angry with the young prince of Helium.

What mad caprice could have induced him so to transgress the etiquette of nations? For lesser things great powers had gone to war.

The princess in her was shocked and angered-but what of the girl!

And the guard-what of them? Evidently they, too, had been so much surprised by the unprecedented action of the stranger that they had not even challenged; but that they had no thought to let the thing go unnoticed was quickly evidenced by the skirring of motors upon the landing-stage and the quick shooting airward of a long-lined patrol boat.

Thuvia watched it dart swiftly eastward. So, too, did other eyes watch.

Within the dense shadows of the skeel grove, in a wide avenue beneath o`erspreading foliage, a flier hung a dozen feet above the ground. From its deck keen eyes watched the far-fanning searchlight of the patrol boat. No light shone from the enshadowed craft. Upon its deck was the silence of the tomb. Its crew of a half-dozen red warriors watched the lights of the patrol boat diminishing in the distance.

"The intellects of our ancestors are with us to-night," said one in a low tone.

"No plan ever carried better," returned another. "They did precisely as the prince foretold."

He who had first spoken turned toward the man who squatted before the control board.

"Now!" he whispered. There was no other order given. Every man upon the craft had evidently been well schooled in each detail of that night`s work. Silently the dark hull crept beneath the cathedral arches of the dark and silent grove.

Thuvia of Ptarth, gazing toward the east, saw the blacker blot against the blackness of the trees as the craft topped the buttressed garden wall. She saw the dim bulk incline gently downward toward the scarlet sward of the garden.

She knew that men came not thus with honourable intent. Yet she did not cry aloud to alarm the near-by guardsmen, nor did she flee to the safety of the palace.

Why?

I can see her shrug her shapely shoulders in reply as she voices the age-old, universal answer of the woman: Because!

Scarce had the flier touched the ground when four men leaped from its deck. They ran forward toward the girl.

Still she made no sign of alarm, standing as though hypnotized. Or could it have been as one who awaited a welcome visitor?

Not until they were quite close to her did she move. Then the nearer moon, rising above the surrounding foliage, touched their faces, lighting all with the brilliancy of her silver rays.

Thuvia of Ptarth saw only strangers-warriors in the harness of Dusar. Now she took fright, but too late!

Before she could voice but a single cry, rough hands seized her. A heavy silken scarf was wound about her head. She was lifted in strong arms and borne to the deck of the flier. There was the sudden whirl of propellers, the rushing of air against her body, and, from far beneath the shouting and the challenge from the guard.

Racing toward the south another flier sped toward Helium. In its cabin a tall red man bent over the soft sole of an upturned sandal. With delicate instruments he measured the faint imprint of a small object which appeared there. Upon a pad beside him was the outline of a key, and here he noted the results of his measurements.

A smile played upon his lips as he completed his task and turned to one who waited at the opposite side of the table.

"The man is a genius," he remarked.

"Only a genius could have evolved such a lock as this is designed to spring. Here, take the sketch, Larok, and give all thine own genius full and unfettered freedom in reproducing it in metal."

The warrior-artificer bowed. "Man builds naught," he said, "that man may not destroy." Then he left the cabin with the sketch.

As dawn broke upon the lofty towers which mark the twin cities of Helium-the scarlet tower of one and the yellow tower of its sister-a flier floated lazily out of the north.

Upon its bow was emblazoned the signia of a lesser noble of a far city of the empire of Helium. Its leisurely approach and the evident confidence with which it moved across the city aroused no suspicion in the minds of the sleepy guard. Their round of duty nearly done, they had little thought beyond the coming of those who were to relieve them.

Peace reigned throughout Helium. Stagnant, emasculating peace. Helium had no enemies. There was naught to fear.

Without haste the nearest air patrol swung sluggishly about and approached the stranger. At easy speaking distance the officer upon her deck hailed the incoming craft.

The cheery "Kaor!" and the plausible explanation that the owner had come from distant parts for a few days of pleasure in gay Helium sufficed. The air-patrol boat sheered off, passing again upon its way. The stranger continued toward a public landing-stage, where she dropped into the ways and came to rest.

At about the same time a warrior entered her cabin.

"It is done, Vas Kor," he said, handing a small metal key to the tall noble who had just risen from his sleeping silks and furs.

"Good!" exclaimed the latter. "You must have worked upon it all during the night, Larok."

The warrior nodded.

"Now fetch me the Heliumetic metal you wrought some days since," commanded Vas Kor.

This done, the warrior assisted his master to replace the handsome jewelled metal of his harness with the plainer ornaments of an ordinary fighting man of Helium, and with the insignia of the same house that appeared upon the bow of the flier.

Vas Kor breakfasted on board. Then he emerged upon the aerial dock, entered an elevator, and was borne quickly to the street below, where he was soon engulfed by the early morning throng of workers hastening to their daily duties.

Among them his warrior trappings were no more remarkable than is a pair of trousers upon Broadway. All Martian men are warriors, save those physically unable to bear arms. The tradesman and his clerk clank with their martial trappings as they pursue their vocations. The schoolboy, coming into the world, as he does, almost adult from the snowy shell that has encompassed his development for five long years, knows so little of life without a sword at his hip that he would feel the same discomfiture at going abroad unarmed that an Earth boy would experience in walking the streets knicker-bockerless.

Vas Kor`s destination lay in Greater Helium, which lies some seventy-five miles across the level plain from Lesser Helium. He had landed at the latter city because the air patrol is less suspicious and alert than that above the larger metropolis where lies the palace of the jeddak.

As he moved with the throng in the parklike canyon of the thoroughfare the life of an awakening Martian city was in evidence about him. Houses, raised high upon their slender metal columns for the night were dropping gently toward the ground. Among the flowers upon the scarlet sward which lies about the buildings children were already playing, and comely women laughing and chatting with their neighbours as they culled gorgeous blossoms for the vases within doors.

The pleasant "kaor" of the Barsoomian greeting fell continually upon the ears of the stranger as friends and neighbours took up the duties of a new day.

The district in which he had landed was residential-a district of merchants of the more prosperous sort. Everywhere were evidences of luxury and wealth. Slaves appeared upon every housetop with gorgeous silks and costly furs, laying them in the sun for airing. Jewel-encrusted women lolled even thus early upon the carven balconies before their sleeping apartments. Later in the day they would repair to the roofs when the slaves had arranged couches and pitched silken canopies to shade them from the sun.

Strains of inspiring music broke pleasantly from open windows, for the Martians have solved the problem of attuning the nerves pleasantly to the sudden transition from sleep to waking that proves so difficult a thing for most Earth folk.

Above him raced the long, light passenger fliers, plying, each in its proper plane, between the numerous landing— stages for internal passenger traffic. Landing-stages that tower high into the heavens are for the great international passenger liners. Freighters have other landing-stages at various lower levels, to within a couple of hundred feet of the ground; nor dare any flier rise or drop from one plane to another except in certain restricted districts where horizontal traffic is forbidden.

Along the close-cropped sward which paves the avenue ground fliers were moving in continuous lines in opposite directions. For the greater part they skimmed along the surface of the sward, soaring gracefully into the air at times to pass over a slower-going driver ahead, or at intersections, where the north and south traffic has the right of way and the east and west must rise above it.

From private hangars upon many a roof top fliers were darting into the line of traffic. Gay farewells and parting admonitions mingled with the whirring of motors and the subdued noises of the city.

Yet with all the swift movement and the countless thousands rushing hither and thither, the predominant suggestion was that of luxurious ease and soft noiselessness.

Martians dislike harsh, discordant clamour. The only loud noises they can abide are the martial sounds of war, the clash of arms, the collision of two mighty dreadnoughts of the air. To them there is no sweeter music than this.

At the intersection of two broad avenues Vas Kor descended from the street level to one of the great pneumatic stations of the city. Here he paid before a little wicket the fare to his destination with a couple of the dull, oval coins of Helium.

Beyond the gatekeeper he came to a slowly moving line of what to Earthly eyes would have appeared to be conical-nosed, eight-foot projectiles for some giant gun. In slow procession the things moved in single file along a grooved track. A half dozen attendants assisted passengers to enter, or directed these carriers to their proper destination.

Vas Kor approached one that was empty. Upon its nose was a dial and a pointer. He set the pointer for a certain station in Greater Helium, raised the arched lid of the thing, stepped in and lay down upon the upholstered bottom. An attendant closed the lid, which locked with a little click, and the carrier continued its slow way.

Presently it switched itself automatically to another track, to enter, a moment later, one of the series of dark— mouthed tubes.

The instant that its entire length was within the black aperture it sprang forward with the speed of a rifle ball. There was an instant of whizzing-a soft, though sudden, stop, and slowly the carrier emerged upon another platform, another attendant raised the lid and Vas Kor stepped out at the station beneath the centre of Greater Helium, seventy-five miles from the point at which he had embarked.

Here he sought the street level, stepping immediately into a waiting ground flier. He spoke no word to the slave sitting in the driver`s seat. It was evident that he had been expected, and that the fellow had received his instructions before his coming.

Scarcely had Vas Kor taken his seat when the flier went quickly into the fast-moving procession, turning presently from the broad and crowded avenue into a less congested street. Presently it left the thronged district behind to enter a section of small shops, where it stopped before the entrance to one which bore the sign of a dealer in foreign silks.

Vas Kor entered the low-ceiling room. A man at the far end motioned him toward an inner apartment, giving no further sign of recognition until he had passed in after the caller and closed the door.

Then he faced his visitor, saluting deferentially.

"Most noble-" he commenced, but Vas Kor silenced him with a gesture.

"No formalities," he said. "We must forget that I am aught other than your slave. If all has been as carefully carried out as it has been planned, we have no time to waste. Instead we should be upon our way to the slave market. Are you ready?"

The merchant nodded, and, turning to a great chest, produced the unemblazoned trappings of a slave. These Vas Kor immediately donned. Then the two passed from the shop through a rear door, traversed a winding alley to an avenue beyond, where they entered a flier which awaited them.

Five minutes later the merchant was leading his slave to the public market, where a great concourse of people filled the great open space in the centre of which stood the slave block.

The crowds were enormous to-day, for Carthoris, Prince of Helium, was to be the principal bidder.

One by one the masters mounted the rostrum beside the slave block upon which stood their chattels. Briefly and clearly each recounted the virtues of his particular offering.

When all were done, the major-domo of the Prince of Helium recalled to the block such as had favourably impressed him. For such he had made a fair offer.

There was little haggling as to price, and none at all when Vas Kor was placed upon the block. His merchant— master accepted the first offer that was made for him, and thus a Dusarian noble entered the household of Carthoris.

CHAPTER III

TREACHERY

The day following the coming of Vas Kor to the palace of the Prince of Helium great excitement reigned throughout the twin cities, reaching its climax in the palace of Carthoris. Word had come of the abduction of Thuvia of Ptarth from her father`s court, and with it the veiled hint that the Prince of Helium might be suspected of considerable knowledge of the act and the whereabouts of the princess.

In the council chamber of John Carter, Warlord of Mars, was Tardos Mors, Jeddak of Helium; Mors Kajak, his son, Jed of Lesser Helium; Carthoris, and a score of the great nobles of the empire.

"There must be no war between Ptarth and Helium, my son," said John Carter. "That you are innocent of the charge that has been placed against you by insinuation, we well know; but Thuvan Dihn must know it well, too.

"There is but one who may convince him, and that one be you. You must hasten at once to the court of Ptarth, and by your presence there as well as by your words assure him that his suspicions are groundless. Bear with you the authority of the Warlord of Barsoom, and of the Jeddak of Helium to offer every resource of the allied powers to assist Thuvan Dihn to recover his daughter and punish her abductors, whomsoever they may be.

"Go! I know that I do not need to urge upon you the necessity for haste."

Carthoris left the council chamber, and hastened to his palace.

Here slaves were busy in a moment setting things to rights for the departure of their master. Several worked about the swift flier that would bear the Prince of Helium rapidly toward Ptarth.

At last all was done. But two armed slaves remained on guard. The setting sun hung low above the horizon. In a moment darkness would envelop all.

One of the guardsmen, a giant of a fellow across whose right cheek there ran a thin scar from temple to mouth, approached his companion. His gaze was directed beyond and above his comrade. When he had come quite close he spoke.

"What strange craft is that?" he asked.

The other turned about quickly to gaze heavenward. Scarce was his back turned toward the giant than the short-sword of the latter was plunged beneath his left shoulder blade, straight through his heart.

Voiceless, the soldier sank in his tracks-stone dead. Quickly the murderer dragged the corpse into the black shadows within the hangar. Then he returned to the flier.

Drawing a cunningly wrought key from his pocket-pouch, he removed the cover of the right-hand dial of the controlling destination compass. For a moment he studied the construction of the mechanism beneath. Then he returned the dial to its place, set the pointer, and removed it again to note the resultant change in the position of the parts affected by the act.

A smile crossed his lips. With a pair of cutters he snipped off the projection which extended through the dial from the external pointer-now the latter might be moved to any point upon the dial without affecting the mechanism below. In other words, the eastern hemisphere dial was useless.

Now he turned his attention to the western dial. This he set upon a certain point. Afterward he removed the cover of this dial also, and with keen tool cut the steel finger from the under side of the pointer.

As quickly as possible he replaced the second dial cover, and resumed his place on guard. To all intents and purposes the compass was as efficient as before; but, as a matter of fact, the moving of the pointers upon the dials resulted now in no corresponding shift of the mechanism beneath-and the device was set, immovably, upon a destination of the slave`s own choosing.

Presently came Carthoris, accompanied by but a handful of his gentlemen. He cast but a casual glance upon the single slave who stood guard. The fellow`s thin, cruel lips, and the sword-cut that ran from temple to mouth aroused the suggestion of an unpleasant memory within him. He wondered where Saran Tal had found the man— then the matter faded from his thoughts, and in another moment the Prince of Helium was laughing and chatting with his companions, though below the surface his heart was cold with dread, for what contingencies confronted Thuvia of Ptarth he could not even guess.

First to his mind, naturally, had sprung the thought that Astok of Dusar had stolen the fair Ptarthian; but almost simultaneously with the report of the abduction had come news of the great fetes at Dusar in honour of the return of the jeddak`s son to the court of his father.

It could not have been he, thought Carthoris, for on the very night that Thuvia was taken Astok had been in Dusar, and yet-

He entered the flier, exchanging casual remarks with his companions as he unlocked the mechanism of the compass and set the pointer upon the capital city of Ptarth.

With a word of farewell he touched the button which controlled the repulsive rays, and as the flier rose lightly into the air, the engine purred in answer to the touch of his finger upon a second button, the propellers whirred as his hand drew back the speed lever, and Carthoris, Prince of Helium, was off into the gorgeous Martian night beneath the hurtling moons and the million stars.

Scarce had the flier found its speed ere the man, wrapping his sleeping silks and furs about him, stretched at full length upon the narrow deck to sleep.

But sleep did not come at once at his bidding.

Instead, his thoughts ran riot in his brain, driving sleep away. He recalled the words of Thuvia of Ptarth, words that had half assured him that she loved him; for when he had asked her if she loved Kulan Tith, she had answered only that she was promised to him.

Now he saw that her reply was open to more than a single construction. It might, of course, mean that she did not love Kulan Tith; and so, by inference, be taken to mean that she loved another.

But what assurance was there that the other was Carthoris of Helium?

The more he thought upon it the more positive he became that not only was there no assurance in her words that she loved him, but none either in any act of hers. No, the fact was, she did not love him. She loved another. She had not been abducted-she had fled willingly with her lover.

With such pleasant thoughts filling him alternately with despair and rage, Carthoris at last dropped into the sleep of utter mental exhaustion.

The breaking of the sudden dawn found him still asleep. His flier was rushing swiftly above a barren, ochre plain-the world-old bottom of a long-dead Martian sea.

In the distance rose low hills. Toward these the craft was headed. As it approached them, a great promontory might have been seen from its deck, stretching out into what had once been a mighty ocean, and circling back once more to enclose the forgotten harbour of a forgotten city, which still stretched back from its deserted quays, an imposing pile of wondrous architecture of a long-dead past.

The countless dismal windows, vacant and forlorn, stared, sightless, from their marble walls; the whole sad city taking on the semblance of scattered mounds of dead men`s sun-bleached skulls-the casements having the appearance of eyeless sockets, the portals, grinning jaws.

Closer came the flier, but now its speed was diminishing-yet this was not Ptarth.

Above the central plaza it stopped, slowly settling Marsward. Within a hundred yards of the ground it came to rest, floating gently in the light air, and at the same instant an alarm sounded at the sleeper`s ear.

Carthoris sprang to his feet. Below him he looked to see the teeming metropolis of Ptarth. Beside him, already, there should have been an air patrol.

He gazed about in bewildered astonishment. There indeed was a great city, but it was not Ptarth. No multitudes surged through its broad avenues. No signs of life broke the dead monotony of its deserted roof tops. No gorgeous silks, no priceless furs lent life and colour to the cold marble and the gleaming ersite.

No patrol boat lay ready with its familiar challenge. Silent and empty lay the great city-empty and silent the surrounding air.

What had happened?

Carthoris examined the dial of his compass. The pointer was set upon Ptarth. Could the creature of his genius have thus betrayed him? He would not believe it.

Quickly he unlocked the cover, turning it back upon its hinge. A single glance showed him the truth, or at least a part of it-the steel projection that communicated the movement of the pointer upon the dial to the heart of the mechanism beneath had been severed.

Who could have done the thing-and why?

Carthoris could not hazard even a faint guess. But the thing now was to learn in what portion of the world he was, and then take up his interrupted journey once more.

If it had been the purpose of some enemy to delay him, he had succeeded well, thought Carthoris, as he unlocked the cover of the second dial the first having shown that its pointer had not been set at all.

Beneath the second dial he found the steel pin severed as in the other, but the controlling mechanism had first been set for a point upon the western hemisphere.

He had just time to judge his location roughly at some place south-west of Helium, and at a considerable distance from the twin cities, when he was startled by a woman`s scream beneath him.

Leaning over the side of the flier, he saw what appeared to be a red woman being dragged across the plaza by a huge green warrior-one of those fierce, cruel denizens of the dead sea-bottoms and deserted cities of dying Mars.

Carthoris waited to see no more. Reaching for the control board, he sent his craft racing plummet-like toward the ground.

The green man was hurrying his captive toward a huge thoat that browsed upon the ochre vegetation of the once scarlet-gorgeous plaza. At the same instant a dozen red warriors leaped from the entrance of a nearby ersite palace, pursuing the abductor with naked swords and shouts of rageful warning.

Once the woman turned her face upward toward the falling flier, and in the single swift glance Carthoris saw that it was Thuvia of Ptarth!

CHAPTER IV

A GREEN MAN`S CAPTIVE

When the light of day broke upon the little craft to whose deck the Princess of Ptarth had been snatched from her father`s garden, Thuvia saw that the night had wrought a change in her abductors.

No longer did their trappings gleam with the metal of Dusar, but instead there was emblazoned there the insignia of the Prince of Helium.

The girl felt renewed hope, for she could not believe that in the heart of Carthoris could lie intent to harm her.

She spoke to the warrior squatting before the control board.

"Last night you wore the trappings of a Dusarian," she said. "Now your metal is that of Helium. What means it?"

The man looked at her with a grin.

"The Prince of Helium is no fool," he said.

Just then an officer emerged from the tiny cabin. He reprimanded the warrior for conversing with the prisoner, nor would he himself reply to any of her inquiries.

No harm was offered her during the journey, and so they came at last to their destination with the girl no wiser as to her abductors or their purpose than at first.

Here the flier settled slowly into the plaza of one of those mute monuments of Mars` dead and forgotten past— the deserted cities that fringe the sad ochre sea-bottoms where once rolled the mighty floods upon whose bosoms moved the maritime commerce of the peoples that are gone for ever.

Thuvia of Ptarth was no stranger to such places. During her wanderings in search of the River Iss, that time she had set out upon what, for countless ages, had been the last, long pilgrimage of Martians, toward the Valley Dor, where lies the Lost Sea of Korus, she had encountered several of these sad reminders of the greatness and the glory of ancient Barsoom.

And again, during her flight from the temples of the Holy Therns with Tars Tarkas, Jeddak of Thark, she had seen them, with their weird and ghostly inmates, the great white apes of Barsoom.

She knew, too, that many of them were used now by the nomadic tribes of green men, but that among them all was no city that the red men did not shun, for without exception they stood amidst vast, waterless tracts, unsuited for the continued sustenance of the dominant race of Martians.

Why, then, should they be bringing her to such a place? There was but a single answer. Such was the nature of their work that they must needs seek the seclusion that a dead city afforded. The girl trembled at thought of her plight.

For two days her captors kept her within a huge palace that even in decay reflected the splendour of the age which its youth had known.

Just before dawn on the third day she had been aroused by the voices of two of her abductors.

"He should be here by dawn," one was saying. "Have her in readiness upon the plaza-else he will never land. The moment he finds that he is in a strange country he will turn about-methinks the prince`s plan is weak in this one spot."

"There was no other way," replied the other. "It is wondrous work to get them both here at all, and even if we do not succeed in luring him to the ground, we shall have accomplished much."

Just then the speaker caught the eyes of Thuvia upon him, revealed by the quick-moving patch of light cast by Thuria in her mad race through the heavens.

With a quick sign to the other, he ceased speaking, and advancing toward the girl, motioned her to rise. Then he led her out into the night toward the centre of the great plaza.

"Stand here," he commanded, "until we come for you. We shall be watching, and should you attempt to escape it will go ill with you-much worse than death. Such are the prince`s orders."

Then he turned and retraced his steps toward the palace, leaving her alone in the midst of the unseen terrors of the haunted city, for in truth these places are haunted in the belief of many Martians who still cling to an ancient superstition which teaches that the spirits of Holy Therns who die before their allotted one thousand years, pass, on occasions, into the bodies of the great white apes.