Fortunately I had water and food with me, and had no desire to return to the chamber, although momentarily dreading to be summoned before some august power to account for myself. I spent hours in searching the walls below, endeavoring to discover some rift or ledge by which I might descend; but there was not the shadow of a chance upon any side. Exhausted I lay down and slept, but my sleep was troubled, and I soon found myself tramping the bard ground again. I could see nothing but starvation ahead, and imagined the indwellers of the glittering cave beneath quietly awaiting my end; although for what purpose I could not guess.

I have not the slightest idea how long I remained upon this barren mountain top, but after hours of mental torture I suddenly caught sight of the air ship flying toward me high above the desert plain. My heart gave one great leap of joy, and then I relapsed into a dreadful fear lest Torrence should not see me. In an instant I had pulled off my shirt and was waving it frantically. I watched for an answer, but no, he was not on the lookout; still I would not relax my efforts until every hope had passed. I shouted, I roared, I waved my shirt and coat frantically. I ran as fast as possible about the rock to attract his attention. I took off one of my boots and beat upon the water barrel; but still he did not signal in reply. I was beside myself with horror at the thought of being left alone in this mysterious world. Surely though, even if he passed he would return to look for me. On and on came the air ship, as magnificently as ever. He had managed then without me to repair the damage, for never had she sailed more splendidly, more superbly than now. Nearer and nearer she came. What if the terrible noise I was making should arouse my captors below, and they should seize and carry me down to their own mysterious regions again? The thought sickened me, yet I dared not cease my bellowing and shouting for a single instant. So near the mountain, and yet no signal. Oh, horror! was he going to leave me? He had reached a point directly above my head; and now he could not see me if he were on deck. It was my last hope.

"Torrence! Torrence!" I cried, as if my heart would break.

Oh God! The agony of that minute as I saw the vessel quickly drift away upon her course, leaving me lost and alone or in the companionship of men whose methods of life were inscrutable. Once more I yelled. It was my last and greatest effort—and—what did I see——? Yes, it had borne fruit. The great machine paused in its flight, and Torrence looked over the rail. I waved, my shirt frantically. He saw me—he heard me. The motion was reversed; and then, like some majestic bird, she settled earthward.

It would be useless to attempt a description of my feelings at that moment. I cannot even realize them myself. I only know that when the huge monster touched the mountain top I sprang upon her side like a madman, and clutched wildly at the footboard before the ladder was dropped. In a minute I was aboard; the rail snapped to behind me, and we were sailing tranquilly away from the horrible scenes that had so beset us. But before a hundred yards had been placed between us and those awful cliffs, a body of men had ranged themselves in line to witness our departure. I do not pretend to account for what I saw in those rock-bound halls; if this were fiction I would doubtless do so; but as it is, I can only offer the suggestions already made, be they worth what they may.

We now flew rapidly away over rough and interminable ranges of mountains. Pure chaotic masses of stone, without a trace of vegetation in sight. Indeed there was no soil to support tree, bush, or herbage. We crossed frightful chasms, hundreds of feet deep, we scaled terrific heights, and looked down from the top of precipices into darkened valleys. Crags were heaped upon crags. Dreadful gorges yawned beneath us. Nothing in our own world can compare with this region, and when it is remembered that not a drop of water, or shovelful of soil is to be found, the terror of the place may be faintly pictured.

At intervals we caught sight of those gigantic birds, which resembled the fabled roc, and which were apparently hatched in these desolations, for they were at home here where no other creature could support life, and what they found to live upon it was impossible to guess. They came swooping up from out the black chasms beneath, and after circling about us in curiosity, would descend again into the awful gulches from which they sprang.

We were days in crossing these rugged ranges, which we called "the mountains of death," and we feel sure that the distance across them was more than a thousand miles. The heat throughout was intense, although nowhere did it compare with what we had already experienced.

Torrence told me that one of those gigantic birds had come to his aid with water, just as it had to me, and the remains of his cask and mine furnished all our drink until we reached the Crystal River, a stream we found and named from its clearness; but this was not until we had put "the mountains of death" entirely behind us. The strange castellated structure upon which I had fallen was the only human habitation we discovered throughout our passage across these rugged ranges, and it remains a mystery to both of us where the inhabitants procured their food supplies, or even the water they drank and furnished to others. How that extraordinary edifice was ever constructed, or how its inmates communicated with the world beyond is likely to remain an unsolved mystery to the end of time.

The air ship had behaved beautifully after leaving the "castle of the dead hills," as we called it, and Torrence told me that he had succeeded in making a perfect adjustment after getting the water, and that he believed the vibrator would not trouble us again. It was fortunate it had not, while crossing "the mountains of death," as there wore long stretches where it would have been difficult to have found enough level land for a resting place, and any misbehavior on the vessel's part might have precipitated us into subterranean depths from which we could never have risen.