be. But, in the first place, let us examine this mysterious gallery, in order to find if we shall need to prepare and mend our ladders."
My uncle now began to see to the efficiency of our Ruhmkorff's coil, which would doubtless soon be needed; the raft, securely fastened to a rock, was left alone. The opening into the new gallery was not twenty paces distant from the spot. Our little troop, with myself at the head, advanced.
The orifice, which was almost circular, presented a diameter of about five feet; the somber tunnel was cut in the living rock, and coated on the inside by the different material which had once passed through it in a state of fusion. The lower part was about level with the water, so that we were able to penetrate to the interior without difficulty. We followed an almost horizontal direction; when, at the end of about a dozen paces, our further advance was checked by the interposition of an enormous block of granite rock.
"Accursed stone!" I cried, furiously, on perceiving that we were stopped by what seemed an insurmountable obstacle.
In vain we looked to the right, in vain we looked to the left; in vain examined it above and below. There existed no passage, no sign of any other tunnel. I experienced the most bitter and painful disappointment. So enraged was I that I would not admit the reality of any obstacle. I stooped to my knees; I looked under the mass of stone. No hole, no interstice. I then looked above. The same barrier of granite! Hans, with the lamp, examined the sides of the tunnel in every direction. But all in vain! It was necessary to renounce all hope of passing through.
I had seated myself upon the ground. My uncle walked angrily and hopelessly up and down. He was evidently desperate. "But," I cried, after some moments' thought, "what about Arne Saknussemm?"
"You are right," replied my uncle, "he can never have been checked by a lump of rock."
"No—ten thousand times no," I cried, with extreme vivacity. "This huge lump of rock, in consequence of some concussion, has in some unexpected way closed up
