For another half hour we trod upon a pavement of bones. We pushed on, impelled by our burning curiosity. What other marvels did this cavern contain? What new treasures lay here for science to unfold? I was prepared for any surprise, my imagination was ready for any astonishment however astounding.
We had long lost sight of the sea shore behind the hills of bones. The rash Professor, careless of losing his way, hurried me forward. We advanced in silence, bathed in luminous electric fluid. By some phenomenon which I am unable to explain, it lighted up all sides of every object equally. Such was its diffusiveness, there being no central point from which the light emanated, that shadows no longer existed. You might have thought yourself under the rays of a vertical sun in a tropical region at noonday and the height of summer. No vapour was visible. The rocks, the distant mountains, a few isolated clumps of forest trees in the distance, presented a weird and wonderful aspect under these totally new conditions of a universal diffusion of light. We were like Hoffmann's shadowless man.
After walking a mile we reached the outskirts of a vast forest, but not one of those forests of fungi which bordered Port Grauben.
Here was the vegetation of the tertiary period in its fullest blaze of magnificence. Tall palms, belonging to species no longer living, splendid palmacites, firs, yews, cypress trees, thujas, representatives of the conifers. were linked together by a tangled network of long climbing plants. A soft carpet of moss and hepaticas luxuriously clothed the soil. A few sparkling streams ran almost in silence under what would have been the shade of the trees, but that there was no shadow. On their banks grew tree-ferns similar to those we grow in hothouses. But a remarkable feature was the total absence of colour in all those trees, shrubs, and plants, growing without the life-giving heat and light of the sun. Everything seemed mixed-up and confounded in one uniform silver grey or light brown tint like that of fading and faded leaves. Not a green leaf anywhere, and the flowers--which were abundant enough in the tertiary period, which first gave birth to flowers--looked like brown-paper flowers, without colour or scent.
My uncle Liedenbrock ventured to penetrate under this colossal grove. I followed him, not without fear. Since nature had here provided vegetable nourishment, why should not the terrible mammals be there too? I perceived in the broad clearings left by fallen trees, decayed with age, leguminose plants, acerineae, rubiceae and many other eatable shrubs, dear to ruminant animals at every period. Then I observed, mingled together in confusion, trees of countries far apart on the surface of the globe. The oak and the palm were growing side by side, the Australian eucalyptus leaned against the Norwegian pine, the birch-tree of the north mingled its foliage with New Zealand kauris. It was enough to distract the most ingenious classifier of terrestrial botany.
Suddenly I halted. I drew back my uncle.
The diffused light revealed the smallest object in the dense and distant thickets. I had thought I saw--no! I did see, with my own eyes, vast colossal forms moving amongst the trees. They were gigantic animals; it was a herd of mastodons--not fossil remains, but living and resembling those the bones of which were found in the marshes of Ohio in 1801. I saw those huge elephants whose long, flexible trunks were grouting and turning up the soil under the trees like a legion of serpents. I could hear the crashing noise of their long ivory tusks boring into the old decaying trunks. The boughs cracked, and the leaves torn away by cartloads went down the cavernous throats of the vast brutes.
So, then, the dream in which I had had a vision of the prehistoric world, of the tertiary and post-tertiary periods, was now realised. And there we were alone, in the bowels of the earth, at the mercy of its wild inhabitants!
My uncle was gazing with intense and eager interest.
"Come on!" said he, seizing my arm. "Forward! forward!"
"No, I will not!" I cried. "We have no firearms. What could we do in the midst of a herd of these four-footed giants? Come away, uncle-- come! No human being may with safety dare the anger of these monstrous beasts."
"No human creature?" replied my uncle in a lower voice. "You are wrong, Axel. Look, look down there! I fancy I see a living creature similar to ourselves: it is a man!"
I looked, shaking my head incredulously. But though at first I was unbelieving I had to yield to the evidence of my senses.
In fact, at a distance of a quarter of a mile, leaning against the trunk of a gigantic kauri, stood a human being, the Proteus of those subterranean regions, a new son of Neptune, watching this countless herd of mastodons.
Immanis pecoris custos, immanior ipse. 
 "The shepherd of gigantic herds, and huger still himself."
Yes, truly, huger still himself. It was no longer a fossil being like him whose dried remains we had easily lifted up in the field of bones; it was a giant, able to control those monsters. In stature he was at least twelve feet high. His head, huge and unshapely as a buffalo's, was half hidden in the thick and tangled growth of his unkempt hair. It most resembled the mane of the primitive elephant. In his hand he wielded with ease an enormous bough, a staff worthy of this shepherd of the geologic period.
We stood petrified and speechless with amazement. But he might see us! We must fly!
"Come, do come!" I said to my uncle, who for once allowed himself to be persuaded.
In another quarter of an hour our nimble heels had carried us beyond the reach of this horrible monster.
And yet, now that I can reflect quietly, now that my spirit has grown calm again, now that months have slipped by since this strange and supernatural meeting, what am I to think? what am I to believe? I must conclude that it was impossible that our senses had been deceived, that our eyes did not see what we supposed they saw. No human being lives in this subterranean world; no generation of men dwells in those inferior caverns of the globe, unknown to and unconnected with the inhabitants of its surface. It is absurd to believe it!
A Journey to the Interior of the Earth -by- Jules Verne