Still the temperature kept rising, and I felt myself steeped in a broiling atmosphere. I could only compare it to the heat of a furnace at the moment when the molten metal is running into the mould. Gradually we had been obliged to throw aside our coats and waistcoats, the. lightest covering became uncomfortable and even painful.

"Are we rising into a fiery furnace?" I cried at one moment when the heat was redoubling.

"No," replied my uncle, "that is impossible -quite impossible!"

"Yet," I answered, feeling the wall, "this well is burning hot."

At the same moment, touching the water, I had to withdraw my hand in haste.

"The water is scalding," I cried.

This time the Professor's only answer was an angry gesture.

Then an unconquerable terror seized upon me, from which I could no longer get free. I felt that a catastrophe was approaching before which the boldest spirit must quail. A dim, vague notion laid hold of my mind, but which was fast hardening into certainty. I tried to repel it, but it would return. I dared not express it in plain terms. Yet a few involuntary observations confirmed me in my view. By the flickering light of the torch I could distinguish contortions in the granite beds; a phenomenon was unfolding in which electricity would play the principal part; then this unbearable heat, this boiling water! I consulted the compass.

The compass had lost its properties! it had ceased to act properly!

CHAPTER XLIII.

SHOT OUT OF A VOLCANO AT LAST!

Yes: our compass was no longer a guide; the needle flew from pole to pole with a kind of frenzied impulse; it ran round the dial, and spun hither and thither as if it were giddy or intoxicated.

I knew quite well that according to the best received theories the mineral covering of the globe is never at absolute rest; the changes brought about by the chemical decomposition of its component parts, the agitation caused by great liquid torrents, and the magnetic currents, are continually tending to disturb it -even when living beings upon its surface may fancy that all is quiet below. A phenomenon of this kind would not have greatly alarmed me, or at any rate it would not have given rise to dreadful apprehensions.

But other facts, other circumstances, of a peculiar nature, came to reveal to me by degrees the true state of the case. There came incessant and continuous explosions. I could only compare them to the loud rattle of along train of chariots driven at full speed over the stones, or a roar of unintermitting thunder.

Then the disordered compass, thrown out of gear by the electric currents, confirmed me in a growing conviction. The mineral crust of the globe threatened to burst up, the granite foundations to come together with a crash, the fissure through which we were helplessly driven would be filled up, the void would be full of crushed fragments of rock, and we poor wretched mortals were to be buried and annihilated in this dreadful consummation.

"My uncle," I cried, "we are lost now, utterly lost!"

"What are you in a fright about now?" was the calm rejoinder. "What is the matter with you?"

"The matter? Look at those quaking walls! look at those shivering rocks. Don't you feel the burning heat? Don't you see how the water boils and bubbles? Are you blind to the dense vapours and steam growing thicker and denser every minute? See this agitated compass needle. It is an earthquake that is threatening us."

My undaunted uncle calmly shook his head.

"Do you think," said he, "an earthquake is coming?"

"I do."

"Well, I think you are mistaken."

"What! don't you recognise the symptoms?"

"Of an earthquake? no! I am looking out for something better."

"What can you mean? Explain?"

"It is an eruption, Axel."

"An eruption! Do you mean to affirm that we are running up the shaft of a volcano?"

"I believe we are," said the indomitable Professor with an air of perfect self-possession; "and it is the best thing that could possibly happen to us under our circumstances."

The best thing! Was my uncle stark mad? What did the man mean? and what was the use of saying facetious things at a time like this?

"What!" I shouted.