During a long, long, weary hour, there crossed my wildly delirious brain all sorts of reasons as to what could have aroused our quiet and faithful guide. The most absurd and ridiculous ideas passed through my head, each more impossible than the other. I believe I was either half or wholly mad.  
Suddenly, however, there arose, as it were from the depths of the earth, a voice of comfort. It was the sound of footsteps! Hans was returning.
 
Presently the uncertain light began to shine upon the walls of the passage, and then it came in view far down the sloping tunnel. At length Hans himself appeared.
 
He approached my uncle, placed his hand upon his shoulder, and gently awakened him. My uncle, as soon as he saw who it was, instantly arose.
 
"Well!" exclaimed the Professor.
 
"Vatten," said the hunter.
 
I did not know a single word of the Danish language, and yet by a sort of mysterious instinct I understood what the guide had said.
 
"Water, water!" I cried, in a wild and frantic tone, clapping my hands, and gesticulating like a madman.
 
"Water!" murmured my uncle, in a voice of deep emotion and gratitude. "Hvar?" ("Where?")
 
"Nedat." ("Below.")
 
"Where? below!" I understood every word. I had caught the hunter by the hands, and I shook them heartily, while he looked on with perfect calmness.
 
The preparations for our departure did not take long, and we were soon making a rapid descent into the tunnel.
 
An hour later we had advanced a thousand yards, and descended two thousand feet.
 
At this moment I heard an accustomed and well-known sound running along the floors of the granite rock—a kind of dull and sullen roar, like that of a distant waterfall.
 
During the first half hour of our advance, not finding the discovered spring, my feelings of intense suffering appeared to return. Once more I began to lose all hope. My uncle, however, observing how downhearted I was again becoming, took up the conversation.
 
"Hans was right," he exclaimed enthusiastically; "that is the dull roaring of a torrent."
 
"A torrent," I cried, delighted at even hearing the welcome words.
 
"There's not the slightest doubt about it," he replied, "a subterranean river is flowing beside us."
 
I made no reply, but hastened on, once more animated by hope. I began not even to feel the deep fatigue which hitherto had overpowered me. The very sound of this glorious murmuring water already refreshed me. We could hear it increasing in volume every moment. The torrent, which for a long time could be heard flowing over our heads, now ran distinctly along the left wall, roaring, rushing, spluttering, and still falling.
 
Several times I passed my hand across the rock hoping to find some trace of humidity—of the slightest percolation. Alas! in vain.
 
Again a half hour passed in the same weary toil. Again we advanced.
 
It now became evident that the hunter, during his absence, had not been able to carry his researches any farther. Guided by an instinct peculiar to the dwellers in mountain regions and water finders, he "smelt" the living spring through the rock. Still he had not seen the precious liquid. He had neither quenched his own thirst, nor brought us one drop in his gourd.
 
Moreover, we soon made the disastrous discovery that, if our progress continued, we should soon be moving away from the torrent, the sound of which gradually diminished. We turned back. Hans halted at the precise spot where the sound of the torrent appeared nearest.
 
I could bear the suspense and suffering no longer, and seated myself against the wall, behind which I could hear the water seething and effervescing not two feet away. But a solid wall of granite still separated us from it!
 
Hans looked keenly at me, and, strange enough, for once I thought I saw a smile on his imperturbable face.
 
He rose from a stone on which he had been seated, and took up the lamp. I could not help rising and following. He moved slowly along the firm and solid granite wall. I watched him with mingled curiosity and eagerness. Presently he halted and placed his ear against the dry stone, moving slowly along and listening with the most extreme care and attention. I understood at once that he was searching for the exact spot where the torrent's roar was most plainly heard. This point he soon found in the lateral wall on the left side, about three feet above the level of the tunnel floor.
 
I was in a state of intense excitement. I scarcely dared believe what the eider-duck hunter was about to do. It was, however, impossible in a moment more not to both understand and applaud, and even to smother him in my embraces, when I saw him raise the heavy crowbar and commence an attack upon the rock itself.
 
"Saved!" I cried.
 
"Yes," cried my uncle, even more excited and delighted than myself; "Hans is quite right. Oh, the worthy, excellent man! We should never have thought of such an idea."
 
And nobody else, I think, would have done so. Such a process, simple as it seemed, would most certainly not have entered our heads. Nothing could be more dangerous than to begin to work with pickaxes in that particular part of the globe. Supposing while he was at work a break-up were to take place, and supposing the torrent once having gained an inch were to take an ell, and come pouring bodily through the broken rock!
 
Not one of these............