"Hear me to the end," the Professor went on with a firm voice. "Whilst you were lying there motionless, I went to examine the conformation of that gallery. It penetrates directly downward, and in a few hours it will bring us to the granite rocks. There we must meet with abundant springs. The nature of the rock assures me of this, and instinct agrees with logic to support my conviction. Now, this is my proposal. When Columbus asked of his ships' crews for three days more to discover a new world, those crews, disheartened and sick as they were, recognised the justice of the claim, and he discovered America. I am the Columbus of this nether world, and I only ask for one more day. If in a single day I have not met with the water that we want, I swear to you we will return to the surface of the earth." In spite of my irritation I was moved with these words, as well as with the violence my uncle was doing to his own wishes in making so hazardous a proposal. "Well," I said, "do as you will, and God reward your superhuman energy. You have now but a few hours to tempt fortune. Let us start!" CHAPTER XXII. TOTAL FAILURE OF WATER This time the descent commenced by the new gallery. Hans walked first as was his custom. We had not gone a hundred yards when the Professor, moving his lantern along the walls, cried: "Here are primitive rocks. Now we are in the right way. Forward!" When in its early stages the earth was slowly cooling, its contraction gave rise in its crust to disruptions, distortions, fissures, and chasms. The passage through which we were moving was such a fissure, through which at one time granite poured out in a molten state. Its thousands of windings formed an inextricable labyrinth through the primeval mass. As fast as we descended, the succession of beds forming the primitive foundation came out with increasing distinctness. Geologists consider this primitive matter to be the base of the mineral crust of the earth, and have ascertained it to be composed of three different formations, schist, gneiss, and mica schist, resting upon that unchangeable foundation, the granite. Never had mineralogists found themselves in so marvellous a situation to study nature in situ. What the boring machine, an insensible, inert instrument, was unable to bring to the surface of the inner structure of the globe, we were able to peruse with our own eyes and handle with our own hands. Through the beds of schist, coloured with delicate shades of green, ran in winding course threads of copper and manganese, with traces of platinum and gold. I thought, what riches are here buried at an unapproachable depth in the earth, hidden for ever from the covetous eyes of the human race! These treasures have been buried at such a profound depth by the convulsions of primeval times that they run no chance of ever being molested by the pickaxe or the spade.