"I must be calm," I said, speaking aloud, as boys whistle to drive away fear. "There can be no doubt that I shall find my companions. There cannot be two roads. It is certain that I was considerably ahead; all I have to do is to go back." Having come to this determination I ascended the tunnel for at least half an hour, unable to decide if I had ever seen certain landmarks before. Every now and then I paused to discover if any loud appeal was made to me, well knowing that in that dense and intensified atmosphere I should hear it a long way off. But no. The most extraordinary silence reigned in this immense gallery. Only the echoes of my own footsteps could be heard. At last I stopped. I could scarcely realize the fact of my isolation. I was quite willing to think that I had made a mistake, but not that I was lost. If I had made a mistake, I might find my way; if lost--I shuddered to think of it. "Come, come," said I to myself, "since there is only one road, and they must come by it, we shall at last meet. All I have to do is still to go upwards. Perhaps, however, not seeing me, and forgetting I was ahead, they may have gone back in search of me. Still, even in this case, if I make haste, I shall get up to them. There can be no doubt about the matter." But as I spoke these last words aloud, it would have been quite clear to any listener--had there been one--that I was by no means convinced of the fact. Moreover in order to associate together these simple ideas and to reunite them under the form of reasoning, required some time. I could not all at once bring my brain to think. Then another dread doubt fell upon my soul. After all, was I ahead? Of course I was. Hans was no doubt following behind preceded by my uncle. I perfectly recollected his having stopped for a moment to strap his baggage on his shoulder. I now remembered this trifling detail. It was, I believe, just at that very moment that I had determined to continue my route. "Again," thought I, reasoning as calmly as was possible, "there is another sure means of not losing my way, a thread to guide me through the labyrinthine subterraneous retreat--one which I had forgotten--my faithful river." This course of reasoning roused my drooping spirits, and I resolved to resume my journey without further delay. No time was to be lost. It was at this moment that I had reason to bless the thoughtfulness of my uncle, when he refused to allow the eider hunter to close the orifices of the hot spring--that small fissure in the great mass of granite. This beneficent spring after having saved us from thirst during so many days would now enable me to regain the right road. Having come to this mental decision, I made up my mind, before I started upwards, that ablution would certainly do me a great deal of good. I stopped to plunge my hands and forehead in the pleasant water of the Hansbach stream, blessing its presence as a certain consolation.