"But unseen voices may emanate from unseen and unseeable creatures who wield invisible blades," answered the green warrior.
"Rot, Tars Tarkas," I cried, "those voices come from beings as real as you or as I. In their veins flows lifeblood that may be let as easily as ours, and the fact that they remain invisible to us is the best proof to my mind that they are mortal; nor overly courageous mortals at that. Think you, Tars Tarkas, that John Carter will fly at the first shriek of a cowardly foe who dare not come out into the open and face a good blade?"
I had spoken in a loud voice that there might be no question that our would-be terrorizers should hear me, for I was tiring of this nerve-racking fiasco. It had occurred to me, too, that the whole business was but a plan to frighten us back into the valley of death from which we had escaped, that we might be quickly disposed of by the savage creatures there.
For a long period there was silence, then of a sudden a soft, stealthy sound behind me caused me to turn suddenly to behold a great many-legged banth creeping sinuously upon me.
The banth is a fierce beast of prey that roams the low hills surrounding the dead seas of ancient Mars. Like nearly all Martian animals it is almost hairless, having only a great bristly mane about its thick neck.
Its long, lithe body is supported by ten powerful legs, its enormous jaws are equipped, like those of the calot, or Martian hound, with several rows of long needle-like fangs; its mouth reaches to a point far back of its tiny ears, while its enormous, protruding eyes of green add the last touch of terror to its awful aspect.
As it crept toward me it lashed its powerful tail against its yellow sides, and when it saw that it was discovered it emitted the terrifying roar which often freezes its prey into momentary paralysis in the instant that it makes its spring.
And so it launched its great bulk toward me, but its mighty voice had held no paralysing terrors for me, and it met cold steel instead of the tender flesh its cruel jaws gaped so widely to engulf.
An instant later I drew my blade from the still heart of this great Barsoomian lion, and turning toward Tars Tarkas was surprised to see him facing a similar monster.
No sooner had he dispatched his than I, turning, as though drawn by the instinct of my guardian subconscious mind, beheld another of the savage denizens of the Martian wilds leaping across the chamber toward me.
From then on for the better part of an hour one hideous creature after another was launched upon us, springing apparently from the empty air about us.
Tars Tarkas was satisfied; here was something tangible that he could cut and slash with his great blade, while I, for my part, may say that the diversion was a marked improvement over the uncanny voices from unseen lips.
That there was nothing supernatural about our new foes was well evidenced by their howls of rage and pain as they felt the sharp steel at their vitals, and the very real blood which flowed from their severed arteries as they died the real death.
I noticed during the period of this new persecution that the beasts appeared only when our backs were turned; we never saw one really materialize from thin air, nor did I for an instant sufficiently lose my excellent reasoning faculties to be once deluded into the belief that the beasts came into the room other than through some concealed and well-contrived doorway.
Among the ornaments of Tars Tarkas' leather harness, which is the only manner of clothing worn by Martians other than silk capes and robes of silk and fur for protection from the cold after dark, was a small mirror, about the bigness of a lady's hand glass, which hung midway between his shoulders and his waist against his broad back.
Once as he stood looking down at a newly fallen antagonist my eyes happened to fall upon this mirror and in its shiny surface I saw pictured a sight that caused me to whisper:
"Move not, Tars Tarkas! Move not a muscle!"
He did not ask why, but stood like a graven image while my eyes watched the strange thing that meant so much to us.
What I saw was the quick movement of a section of the wall behind me. It was turning upon pivots, and with it a section of the floor directly in front of it was turning. It was as though you placed a visiting-card upon end on a silver dollar that you had laid flat upon a table, so that the edge of the card perfectly bisected the surface of the coin.
The card might represent the section of the wall that turned and the silver dollar the section of the floor. Both were so nicely fitted into the adjacent portions of the floor and wall that no crack had been noticeable in the dim light of the chamber.
As the turn was half completed a great beast was revealed sitting upon its haunches upon that part of the revolving floor that had been on the opposite side before the wall commenced to move; when the section stopped, the beast was facing toward me on our side of the partition-it was very simple.
But what had interested me most was the sight that the half-turned section had presented through the opening that it had made. A great chamber, well lighted, in which were several men and women chained to the wall, and in front of them, evidently directing and operating the movement of the secret doorway, a wicked-faced man, neither red as are the red men of Mars, nor green as are the green men, but white, like myself, with a great mass of flowing yellow hair.
The prisoners behind him were red Martians. Chained with them were a number of fierce beasts, such as had been turned upon us, and others equally as ferocious.
As I turned to meet my new foe it was with a heart considerably lightened.
"Watch the wall at your end of the chamber, Tars Tarkas," I cautioned, "it is through secret doorways in the wall that the brutes are loosed upon us." I was very close to him and spoke in a low whisper that my knowledge of their secret might not be disclosed to our tormentors.
As long as we remained each facing an opposite end of the apartment no further attacks were made upon us, so it was quite clear to me that the partitions were in some way pierced that our actions might be observed from without.
At length a plan of action occurred to me, and backing quite close to Tars Tarkas I unfolded my scheme in a low whisper, keeping my eyes still glued upon my end of the room.
The great Thark grunted his assent to my proposition when I had done, and in accordance with my plan commenced backing toward the wall which I faced while I advanced slowly ahead of him.
When we had reached a point some ten feet from the secret doorway I halted my companion, and cautioning him to remain absolutely motionless until I gave the prearranged signal I quickly turned my back to the door through which I could almost feel the burning and baleful eyes of our would be executioner.
Instantly my own eyes sought the mirror upon Tars Tarkas' back and in another second I was closely watching the section of the wall which had been disgorging its savage terrors upon us.
I had not long to wait, for presently the golden surface commenced to move rapidly. Scarcely had it started than I gave the signal to Tars Tarkas, simultaneously springing for the receding half of the pivoting door. In like manner the Thark wheeled and leaped for the opening being made by the inswinging section.
A single bound carried me completely through into the adjoining room and brought me face to face with the fellow whose cruel face I had seen before. He was about my own height and well muscled and in every outward detail moulded precisely as are Earth men.
At his side hung a long-sword, a short-sword, a dagger, and one of the destructive radium revolvers that are common upon Mars.
The fact that I was armed only with a long-sword, and so according to the laws and ethics of battle everywhere upon Barsoom should only have been met with a similar or lesser weapon, seemed to have no effect upon the moral sense of my enemy, for he whipped out his revolver ere I scarce had touched the floor by his side, but an uppercut from my long-sword sent it flying from his grasp before he could discharge it.