"John Carter, Prince of Helium," he repeated slowly, as though he could not quite grasp the truth of the statement. "John Carter, the mightiest warrior of Barsoom!"

And then he dismounted and placed his hand upon my shoulder after the manner of most friendly greeting upon Mars.

"It is my duty, and it should be my pleasure, to kill you, John Carter," he said, "but always in my heart of hearts have I admired your prowess and believed in your sincerity the while I have questioned and disbelieved the therns and their religion.

"It would mean my instant death were my heresy to be suspected in the court of Kulan Tith, but if I may serve you, Prince, you have but to command Torkar Bar, Dwar of the Kaolian Road."

Truth and honesty were writ large upon the warrior's noble countenance, so that I could not but have trusted him, enemy though he should have been. His title of Captain of the Kaolian Road explained his timely presence in the heart of the savage forest, for every highway upon Barsoom is patrolled by doughty warriors of the noble class, nor is there any service more honorable than this lonely and dangerous duty in the less frequented sections of the domains of the red men of Barsoom.

"Torkar Bar has already placed a great debt of gratitude upon my shoulders," I replied, pointing to the carcass of the creature from whose heart he was dragging his long spear.

The red man smiled.

"It was fortunate that I came when I did," he said. "Only this poisoned spear pricking the very heart of a sith can kill it quickly enough to save its prey. In this section of Kaol we are all armed with a long sith spear, whose point is smeared with the poison of the creature it is intended to kill; no other virus acts so quickly upon the beast as its own.

"Look," he continued, drawing his dagger and making an incision in the carcass a foot above the root of the sting, from which he presently drew forth two sacs, each of which held fully a gallon of the deadly liquid.

"Thus we maintain our supply, though were it not for certain commercial uses to which the virus is put, it would scarcely be necessary to add to our present store, since the sith is almost extinct.

"Only occasionally do we now run upon one. Of old, however, Kaol was overrun with the frightful monsters that often came in herds of twenty or thirty, darting down from above into our cities and carrying away women, children, and even warriors."

As he spoke I had been wondering just how much I might safely tell this man of the mission which brought me to his land, but his next words anticipated the broaching of the subject on my part, and rendered me thankful that I had not spoken too soon.

"And now as to yourself, John Carter," he said, "I shall not ask your business here, nor do I wish to hear it. I have eyes and ears and ordinary intelligence, and yesterday morning I saw the party that came to the city of Kaol from the north in a small flier. But one thing I ask of you, and that is: the word of John Carter that he contemplates no overt act against either the nation of Kaol or its jeddak."

"You may have my word as to that, Torkar Bar," I replied.

"My way leads along the Kaolian road, away from the city of Kaol," he continued. "I have seen no one-John Carter least of all. Nor have you seen Torkar Bar, nor ever heard of him. You understand?"

"Perfectly," I replied.

He laid his hand upon my shoulder.

"This road leads directly into the city of Kaol," he said. "I wish you fortune," and vaulting to the back of his thoat he trotted away without even a backward glance.

It was after dark when Woola and I spied through the mighty forest the great wall which surrounds the city of Kaol.

We had traversed the entire way without mishap or adventure, and though the few we had met had eyed the great calot wonderingly, none had pierced the red pigment with which I had smoothly smeared every square inch of my body.

But to traverse the surrounding country, and to enter the guarded city of Kulan Tith, Jeddak of Kaol, were two very different things. No man enters a Martian city without giving a very detailed and satisfactory account of himself, nor did I delude myself with the belief that I could for a moment impose upon the acumen of the officers of the guard to whom I should be taken the moment I applied at any one of the gates.

My only hope seemed to lie in entering the city surreptitiously under cover of the darkness, and once in, trust to my own wits to hide myself in some crowded quarter where detection would be less liable to occur.

With this idea in view I circled the great wall, keeping within the fringe of the forest, which is cut away for a short distance from the wall all about the city, that no enemy may utilize the trees as a means of ingress.

Several times I attempted to scale the barrier at different points, but not even my earthly muscles could overcome that cleverly constructed rampart. To a height of thirty feet the face of the wall slanted outward, and then for almost an equal distance it was perpendicular, above which it slanted in again for some fifteen feet to the crest.

And smooth! Polished glass could not be more so. Finally I had to admit that at last I had discovered a Barsoomian fortification which I could not negotiate.

Discouraged, I withdrew into the forest beside a broad highway which entered the city from the east, and with Woola beside me lay down to sleep.

It was daylight when I was awakened by the sound of stealthy movement near by.

As I opened my eyes Woola, too, moved and, coming up to his haunches, stared through the intervening brush toward the road, each hair upon his neck stiffly erect.

At first I could see nothing, but presently I caught a glimpse of a bit of smooth and glossy green moving among the scarlet and purple and yellow of the vegetation.

Motioning Woola to remain quietly where he was, I crept forward to investigate, and from behind the bole of a great tree I saw a long line of the hideous green warriors of the dead sea bottoms hiding in the dense jungle beside the road.

As far as I could see, the silent line of destruction and death stretched away from the city of Kaol. There could be but one explanation. The green men were expecting an exodus of a body of red troops from the nearest city gate, and they were lying there in ambush to leap upon them.

I owed no fealty to the Jeddak of Kaol, but he was of the same race of noble red men as my own princess, and I would not stand supinely by and see his warriors butchered by the cruel and heartless demons of the waste places of Barsoom.

Cautiously I retraced my steps to where I had left Woola, and warning him to silence, signaled him to follow me. Making a considerable detour to avoid the chance of falling into the hands of the green men, I came at last to the great wall.

A hundred yards to my right was the gate from which the troops were evidently expected to issue, but to reach it I must pass the flank of the green warriors within easy sight of them, and, fearing that my plan to warn the Kaolians might thus be thwarted, I decided upon hastening toward the left, where another gate a mile away would give me ingress to the city.

I knew that the word I brought would prove a splendid passport to Kaol, and I must admit that my caution was due more to my ardent desire to make my way into the city than to avoid a brush with the green men. As much as I enjoy a fight, I cannot always indulge myself, and just now I had more weighty matters to occupy my time than spilling the blood of strange warriors.

Could I but win beyond the city's wall, there might be opportunity in the confusion and excitement which were sure to follow my announcement of an invading force of green warriors to find my way within the palace of the jeddak, where I was sure Matai Shang and his party would be quartered.