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.