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 compa.s.s. 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 compa.s.s 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 compa.s.s and set the pointer upon the capital city of Ptarth.

With a word of farewell he touched the b.u.t.ton 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 b.u.t.ton, 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 a.s.sured him that she loved him; for when he had asked her if she loved Kulan t.i.th, 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 t.i.th; and so, by inference, be taken to mean that she loved another.

But what a.s.surance 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 a.s.surance 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 cas.e.m.e.nts 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 mult.i.tudes 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 compa.s.s. 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 s.n.a.t.c.hed 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 superst.i.tion which teaches that the spirits of Holy Therns who die before their allotted one thousand years, pa.s.s, on occasions, into the bodies of the great white apes.

To Thuvia, however, the real danger of attack by one of these ferocious, manlike beasts was quite sufficient. She no longer believed in the weird soul transmigration that the therns had taught her before she was rescued from their clutches by John Carter; but she well knew the horrid fate that awaited her should one of the terrible beasts chance to spy her during its nocturnal prowlings.

What was that?

Surely she could not be mistaken. Something had moved, stealthily, in the shadow of one of the great monoliths that line the avenue where it entered the plaza opposite her!

Thar Ban, jed among the hordes of Torquas, rode swiftly across the ochre vegetation of the dead sea-bottom toward the ruins of ancient Aaanthor.

He had ridden far that night, and fast, for he had but come from the despoiling of the incubator of a neighbouring green horde with which the hordes of Torquas were perpetually warring.

His giant thoat was far from jaded, yet it would be well, thought Thar Ban, to permit him to graze upon the ochre moss which grows to greater height within the protected courtyards of deserted cities, where the soil is richer than on the sea-bottoms, and the plants partly shaded from the sun during the cloudless Martian day.

Within the tiny stems of this dry-seeming plant is sufficient moisture for the needs of the huge bodies of the mighty thoats, which can exist for months without water, and for days without even the slight moisture which the ochre moss contains.

As Thar Ban rode noiselessly up the broad avenue which leads from the quays of Aaanthor to the great central plaza, he and his mount might have been mistaken for spectres from a world of dreams, so grotesque the man and beast, so soundless the great thoat's padded, nailless feet upon the moss-grown flagging of the ancient pavement.

The man was a splendid specimen of his race. Fully fifteen feet towered his great height from sole to pate. The moonlight glistened against his glossy green hide, sparkling the jewels of his heavy harness and the ornaments that weighted his four muscular arms, while the upcurving tusks that protruded from his lower jaw gleamed white and terrible.

At the side of his thoat were slung his long radium rifle and his great, forty-foot, metal-shod spear, while from his own harness depended his long-sword and his short-sword, as well as his lesser weapons.

His protruding eyes and antennae-like ears were turning constantly hither and thither, for Thar Ban was yet in the country of the enemy, and, too, there was always the menace of the great white apes, which, John Carter was wont to say, are the only creatures that can arouse in the b.r.e.a.s.t.s of these fierce denizens of the dead sea-bottoms even the remotest semblance of fear.

As the rider neared the plaza, he reined suddenly in. His slender, tubular ears pointed rigidly forward. An unwonted sound had reached them. Voices! And where there were voices, outside of Torquas, there, too, were enemies. All the world of wide Barsoom contained naught but enemies for the fierce Torquasians.

Thar Ban dismounted. Keeping in the shadows of the great monoliths that line the Avenue of Quays of sleeping Aaanthor, he approached the plaza. Directly behind him, as a hound at heel, came the slate-grey thoat, his white belly shadowed by his barrel, his vivid yellow feet merging into the yellow of the moss beneath them.

In the centre of the plaza Thar Ban saw the figure of a red woman. A red warrior was conversing with her. Now the man turned and retraced his steps toward the palace at the opposite side of the plaza.

Thar Ban watched until he had disappeared within the yawning portal. Here was a captive worth having! Seldom did a female of their hereditary enemies fall to the lot of a green man. Thar Ban licked his thin lips.

Thuvia of Ptarth watched the shadow behind the monolith at the opening to the avenue opposite her. She hoped that it might be but the figment of an overwrought imagination.

But no! Now, clearly and distinctly, she saw it move. It came from behind the screening shelter of the ersite shaft.

The sudden light of the rising sun fell upon it. The girl trembled. The THING was a huge green warrior!

Swiftly it sprang toward her. She screamed and tried to flee; but she had scarce turned toward the palace when a giant hand fell upon her arm, she was whirled about, and half dragged, half carried toward a huge thoat that was slowly grazing out of the avenue's mouth on to the ochre moss of the plaza.

At the same instant she turned her face upward toward the whirring sound of something above her, and there she saw a swift flier dropping toward her, the head and shoulders of a man leaning far over the side; but the man's features were deeply shadowed, so that she did not recognize them.

Now from behind her came the shouts of her red abductors. They were racing madly after him who dared to steal what they already had stolen.

As Thar Ban reached the side of his mount he s.n.a.t.c.hed his long radium rifle from its boot, and, wheeling, poured three shots into the oncoming red men.

Such is the uncanny marksmanship of these Martian savages that three red warriors dropped in their tracks as three projectiles exploded in their vitals.

The others halted, nor did they dare return the fire for fear of wounding the girl.

Then Thar Ban vaulted to the back of his thoat, Thuvia of Ptarth still in his arms, and with a savage cry of triumph disappeared down the black canyon of the Avenue of Quays between the sullen palaces of forgotten Aaanthor.

Carthoris' flier had not touched the ground before he had sprung from its deck to race after the swift thoat, whose eight long legs were sending it down the avenue at the rate of an express train; but the men of Dusar who still remained alive had no mind to permit so valuable a capture to escape them.

They had lost the girl. That would be a difficult thing to explain to Astok; but some leniency might be expected could they carry the Prince of Helium to their master instead.

So the three who remained set upon Carthoris with their long-swords, crying to him to surrender; but they might as successfully have cried aloud to Thuria to cease her mad hurtling through the Barsoomian sky, for Carthoris of Helium was a true son of the Warlord of Mars and his incomparable Dejah Thoris.

Carthoris' long-sword had been already in his hand as he leaped from the deck of the flier, so the instant that he realized the menace of the three red warriors, he wheeled to face them, meeting their onslaught as only John Carter himself might have done.

So swift his sword, so mighty and agile his half-earthly muscles, that one of his opponents was down, crimsoning the ochre moss with his life-blood, when he had scarce made a single pa.s.s at Carthoris.

Now the two remaining Dusarians rushed simultaneously upon the Heliumite. Three long-swords clashed and sparkled in the moonlight, until the great white apes, roused from their slumbers, crept to the lowering windows of the dead city to view the b.l.o.o.d.y scene beneath them.

Thrice was Carthoris touched, so that the red blood ran down his face, blinding him and dyeing his broad chest. With his free hand he wiped the gore from his eyes, and with the fighting smile of his father touching his lips, leaped upon his antagonists with renewed fury.

A single cut of his heavy sword severed the head of one of them, and then the other, backing away clear of that point of death, turned and fled toward the palace at his back.

Carthoris made no step to pursue. He had other concern than the meting of even well-deserved punishment to strange men who masqueraded in the metal of his own house, for he had seen that these men were tricked out in the insignia that marked his personal followers.

Turning quickly toward his flier, he was soon rising from the plaza in pursuit of Thar Ban.