For the better part of two hours the trail paralleled the barrier, and then suddenly turned toward it through the roughest and seemingly most impassable country I ever had beheld.
Enormous granite boulders blocked the way on every hand; deep rifts in the ice threatened to engulf us at the least misstep; and from the north a slight breeze wafted to our nostrils an unspeakable stench that almost choked us.
For another two hours we were occupied in traversing a few hundred yards to the foot of the barrier.
Then, turning about the corner of a wall-like outcropping of granite, we came upon a smooth area of two or three acres before the base of the towering pile of ice and rock that had baffled us for days, and before us beheld the dark and cavernous mouth of a cave.
From this repelling portal the horrid stench was emanating, and as Thuvan Dihn espied the place he halted with an exclamation of profound astonishment.
"By all my ancestors!" he ejaculated. "That I should have lived to witness the reality of the fabled Carrion Caves! If these indeed be they, we have found a way beyond the ice-barrier.
"The ancient chronicles of the first historians of Barsoom-so ancient that we have for ages considered them mythology-record the passing of the yellow men from the ravages of the green hordes that overran Barsoom as the drying up of the great oceans drove the dominant races from their strongholds.
"They tell of the wanderings of the remnants of this once powerful race, harassed at every step, until at last they found a way through the ice-barrier of the north to a fertile valley at the pole.
"At the opening to the subterranean passage that led to their haven of refuge a mighty battle was fought in which the yellow men were victorious, and within the caves that gave ingress to their new home they piled the bodies of the dead, both yellow and green, that the stench might warn away their enemies from further pursuit.
"And ever since that long-gone day have the dead of this fabled land been carried to the Carrion Caves, that in death and decay they might serve their country and warn away invading enemies. Here, too, is brought, so the fable runs, all the waste stuff of the nation-everything that is subject to rot, and that can add to the foul stench that assails our nostrils.
"And death lurks at every step among rotting dead, for here the fierce apts lair, adding to the putrid accumulation with the fragments of their own prey which they cannot devour. It is a horrid avenue to our goal, but it is the only one."
"You are sure, then, that we have found the way to the land of the yellow men?" I cried.
"As sure as may be," he replied; "having only ancient legend to support my belief. But see how closely, so far, each detail tallies with the world-old story of the hegira of the yellow race. Yes, I am sure that we have discovered the way to their ancient hiding place."
"If it be true, and let us pray that such may be the case," I said, "then here may we solve the mystery of the disappearance of Tardos Mors, Jeddak of Helium, and Mors Kajak, his son, for no other spot upon Barsoom has remained unexplored by the many expeditions and the countless spies that have been searching for them for nearly two years. The last word that came from them was that they sought Carthoris, my own brave son, beyond the ice-barrier."
As we talked we had been approaching the entrance to the cave, and as we crossed the threshold I ceased to wonder that the ancient green enemies of the yellow men had been halted by the horrors of that awful way.
The bones of dead men lay man high upon the broad floor of the first cave, and over all was a putrid mush of decaying flesh, through which the apts had beaten a hideous trail toward the entrance to the second cave beyond.
The roof of this first apartment was low, like all that we traversed subsequently, so that the foul odors were confined and condensed to such an extent that they seemed to possess tangible substance. One was almost tempted to draw his short-sword and hew his way through in search of pure air beyond.
"Can man breathe this polluted air and live?" asked Thuvan Dihn, choking.
"Not for long, I imagine," I replied; "so let us make haste. I will go first, and you bring up the rear, with Woola between. Come," and with the words I dashed forward, across the fetid mass of putrefaction.
It was not until we had passed through seven caves of different sizes and varying but little in the power and quality of their stenches that we met with any physical opposition. Then, within the eighth cave, we came upon a lair of apts.
A full score of the mighty beasts were disposed about the chamber. Some were sleeping, while others tore at the fresh-killed carcasses of new-brought prey, or fought among themselves in their love-making.
Here in the dim light of their subterranean home the value of their great eyes was apparent, for these inner caves are shrouded in perpetual gloom that is but little less than utter darkness.
To attempt to pass through the midst of that fierce herd seemed, even to me, the height of folly, and so I proposed to Thuvan Dihn that he return to the outer world with Woola, that the two might find their way to civilization and come again with a sufficient force to overcome not only the apts, but any further obstacles that might lie between us and our goal.
"In the meantime," I continued, "I may discover some means of winning my way alone to the land of the yellow men, but if I am unsuccessful one life only will have been sacrificed. Should we all go on and perish, there will be none to guide a succoring party to Dejah Thoris and your daughter."
"I shall not return and leave you here alone, John Carter," replied Thuvan Dihn. "Whether you go on to victory or death, the Jeddak of Ptarth remains at your side. I have spoken."
I knew from his tone that it were useless to attempt to argue the question, and so I compromised by sending Woola back with a hastily penned note enclosed in a small metal case and fastened about his neck. I commanded the faithful creature to seek Carthoris at Helium, and though half a world and countless dangers lay between I knew that if the thing could be done Woola would do it.
Equipped as he was by nature with marvelous speed and endurance, and with frightful ferocity that made him a match for any single enemy of the way, his keen intelligence and wondrous instinct should easily furnish all else that was needed for the successful accomplishment of his mission.
It was with evident reluctance that the great beast turned to leave me in compliance with my command, and ere he had gone I could not resist the inclination to throw my arms about his great neck in a parting hug. He rubbed his cheek against mine in a final caress, and a moment later was speeding through the Carrion Caves toward the outer world.
In my note to Carthoris I had given explicit directions for locating the Carrion Caves, impressing upon him the necessity for making entrance to the country beyond through this avenue, and not to attempt under any circumstances to cross the ice-barrier with a fleet. I told him that what lay beyond the eighth cave I could not even guess; but I was sure that somewhere upon the other side of the ice-barrier his mother lay in the power of Matai Shang, and that possibly his grandfather and great-grandfather as well, if they lived.
Further, I advised him to call upon Kulan Tith and the son of Thuvan Dihn for warriors and ships that the expedition might be sufficiently strong to insure success at the first blow.
"And," I concluded, "if there be time bring Tars Tarkas with you, for if I live until you reach me I can think of few greater pleasures than to fight once more, shoulder to shoulder, with my old friend."
When Woola had left us Thuvan Dihn and I, hiding in the seventh cave, discussed and discarded many plans for crossing the eighth chamber. From where we stood we saw that the fighting among the apts was growing less, and that many that had been feeding had ceased and lain down to sleep.