For a long and weary hour we tramped over this great bed of bones. We advanced regardless of everything, drawn on by ardent curiosity. What other marvels did this great cavern contain—what other wondrous treasures for the scientific man? My eyes were quite prepared for any number of surprises, my imagination lived in expectation of something new and wonderful.

The borders of the great Central Ocean had for some time disappeared behind the hills that were scattered over the ground occupied by the plain of bones. The imprudent and enthusiastic Professor, who did not care whether he lost himself or not, hurried me forward. We advanced silently, bathed in waves of electric fluid.

By reason of a phenomenon which I cannot explain, and thanks to its extreme diffusion, now complete, the light illumined equally the sides of every hill and rock. Its seat appeared to be nowhere, in no determined force, and produced no shade whatever.

The appearance presented was that of a tropical country at midday in summer—in the midst of the equatorial regions and under the vertical rays of the sun.

All signs of vapor had disappeared. The rocks, the distant mountains, some confused masses of far-off forests, assumed a weird and mysterious aspect under this equal distribution of the luminous fluid!

We resembled, to a certain extent, the mysterious personage in one of Hoffmann's fantastic tales—the man who lost his shadow.

After we had walked about a mile farther, we came to the edge of a vast forest not, however, one of the vast mushroom forests we had discovered near Port Gretchen.

It was the glorious and wild vegetation of the Tertiary period, in all its superb magnificence. Huge palms, of a species now unknown, superb palmacites—a genus of fossil palms from the coal formation—pines, yews, cypress, and conifers or cone-bearing trees, the whole bound together by an inextricable and complicated mass of creeping plants.

A beautiful carpet of mosses and ferns grew beneath the trees. Pleasant brooks murmured beneath umbrageous boughs, little worthy of this name, for no shade did they give. Upon their borders grew small treelike shrubs, such as are seen in the hot countries on our own inhabited globe.

The one thing wanting in these plants, these shrubs, these trees—was color! Forever deprived of the vivifying warmth of the sun, they were vapid and colorless. All shade was lost in one uniform tint, of a brown and faded character. The leaves were wholly devoid of verdure, and the flowers, so numerous during the Tertiary period which gave them birth, were without color and without perfume, something like paper discolored by long exposure to the atmosphere.

My uncle ventured beneath the gigantic groves. I followed him, though not without a certain amount of apprehension. Since nature had shown herself capable of producing such stupendous vegetable supplies, why might we not meet with mammals just as large, and therefore dangerous?

I particularly remarked, in the clearings left by trees that had fallen and been partially consumed by time, many leguminous (beanlike) shrubs, such as the maple and other eatable trees, dear to ruminating animals. Then there appeared confounded together and intermixed, the trees of such varied lands, specimens of the vegetation of every part of the globe; there was the oak near the palm tree, the Australian eucalyptus, an interesting class of the order Myrtaceae—leaning against the tall Norwegian pine, the poplar of the north, mixing its branches with those of the New Zealand kauris. It was enough to drive the most ingenious classifier of the upper regions out of his mind, and to upset all his received ideas about botany.

Suddenly I stopped short and restrained my uncle.

The extreme diffuseness of the light enabled me to see the smallest objects in the distant copses. I thought I saw—no, I really did see with my own eyes—immense, gigantic animals moving about under the mighty trees. Yes, they were truly gigantic animals, a whole herd of mastodons, not fossils, but living, and exactly like those discovered in 1801, on the marshy banks of the great Ohio, in North America.

Yes, I could see these enormous elephants, whose trunks were tearing down large boughs, and working in and out the trees like a legion of serpents. I could hear the sounds of the mighty tusks uprooting huge trees!

The boughs crackled, and the whole masses of leaves and green branches went down the capacious throats of these terrible monsters!

That wondrous dream, when I saw the antehistorical times revivified, when the Tertiary and Quaternary periods passed before me, was now realized!

And there we were alone, far down in the bowels of the earth, at the mercy of its ferocious inhabitants!

My uncle paused, full of wonder and astonishment.

"Come!" he said at last, when his first surprise was over, "Come along, my boy, and let us see them nearer."

"No," replied I, restraining his efforts to drag me forward, "we are wholly without arms. What should we do in the midst of that flock of gigantic quadrupeds? Come away, Uncle, I implore you. No human creature can with impunity brave the ferocious anger of these monsters."

"No human creature," said my uncle, suddenly lowering his voice to a mysterious whisper, "you are mistaken, my dear Henry. Look! look yonder! It seems to me that I behold a human being—a being like ourselves—a man!"

I looked, shrugging my shoulders, decided to push incredulity to its very last limits. But whatever might have been my wish, I was compelled to yield to the weight of ocular demonstration.

Yes—not more than a quarter of a mile off, leaning against the trunk of an enormous tree, was a human being—a Proteus of these subterranean regions, a new son of Neptune keeping this innumerable herd of mastodons.

Immanis pecoris custos, immanior ipse!

Yes—it was no longer a fossil whose corpse we had raised from the ground in the great cemetery, but a giant capable of guiding and driving these prodigious monsters. His height was above twelve feet. His head, as big as the head of a buffalo, was lost in a mane of matted hair. It was indeed a huge mane, like those which belonged to the elephants of the earlier ages of the world.

In his hand was a branch of a tree, which served as a crook for this antediluvian shepherd.

We remained profoundly still, speechless with surprise.

But we might at any moment be seen by him. Nothing remained for us but instant flight.

"Come, come!" I cried, dragging my uncle along; and, for the first time, he made no resistance to my wishes.

A quarter of an hour later we were far away from that terrible monster!

Now that I think of the matter calmly, and that I reflect upon it dispassionately; now that months, years, have passed since this strange and unnatural adventure befell us—what am I to think, what am I to believe?

No, it is utterly impossible! Our ears must have deceived us, and our eyes have cheated us! we have not seen what we believed we had seen. No human being could by any possibility have existed in that subterranean world! No generation of men could inhabit the lower caverns of the globe without taking note of those who peopled the surface, without communication with them. It was folly, folly, folly! nothing else!

I am rather inclined to admit the existence of some animal resembling in structure the human race—of some monkey of the first geological epochs, like that discovered by M. Lartet in the ossiferous deposit of Sansan.

But this animal, or being, whichsoever it was, surpassed in height all things known to modern science. Never mind. However unlikely it may be, it might have been a monkey—but a man, a living man, and with him a whole generation of gigantic animals, buried in the entrails of the earth—it was too monstrous to be believed!