This apparently astounding acoustic mystery is easily explainable by simple natural laws; it arose from the conductibility of the rock. There are many instances of this singular propagation of sound which are not perceptible in its less mediate positions. In the interior gallery of St. Paul’s, and amid the curious caverns in Sicily, these phenomena are observable. The most marvelous of them all is known as the Ear of Dionysius.
These memories of the past, of my early reading and studies, came fresh into my thoughts. Moreover, I began to reason that if my uncle and I could communicate at so great a distance, no serious obstacle could exist between us. All I had to do was to follow the direction whence the sound had reached me; and, logically putting it, I must reach him if my strength did not fail.
I accordingly rose to my feet. I soon found, however, that I could not walk; that I must drag myself along. The slope, as I expected, was very rapid; but I allowed myself to slip down.
Soon the rapidity of the descent began to assume frightful proportions; and menaced a fearful fall. I clutched at the sides; I grasped at projections of rocks; I threw myself backward. All in vain. My weakness was so great I could do nothing to save myself.
Suddenly earth failed me.
I was first launched into a dark gloomy void. I then struck against the projecting asperities of a vertical gallery, a perfect well. My head bounded against a pointed rock, and I lost all knowledge of existence. As far as I was concerned, death had claimed me for his own.
XXVI
A Rapid Recovery
When I returned to the consciousness of existence, I found myself surrounded by a kind of semiobscurity, lying on some thick soft coverlets. My uncle was watching—his eyes fixed intently on my countenance, a grave expression on his face, a tear in his eye. At the first sigh which struggled from my bosom, he took hold of my hand. When he saw my eyes open and fix themselves upon his, he uttered a loud cry of joy.
“He lives! He lives!”
“Yes, my good uncle,” I whispered.
“My dear boy,” continued the grim Professor, clasping me to his heart, “you are saved!”
I was deeply and unaffectedly touched by the tone in which these words were uttered, and even more by the kindly care which accompanied them. The Professor, however, was one of those men who must be severely tried in order to induce any display of affection or gentle emotion. At this moment our friend Hans, the guide, joined us. He saw my hand in that of my uncle, and I venture to say that, taciturn as he was, his eyes beamed with lively satisfaction.
“God dag,” he said.
“Good day, Hans, good day,” I replied, in as hearty a tone as I could assume, “and now, Uncle, that we are together, tell me where we are. I have lost all idea of our position, as of everything else.”
“Tomorrow, Harry, tomorrow,” he replied. “Today you are far too weak. Your head is surrounded with bandages and poultices that must not be touched. Sleep, my boy, sleep, and tomorrow you will know all that you require.”
“But,” I cried, “let me know what o’clock it is—what day it is?”
“It is now eleven o’clock at night, and this is once more Sunday. It is now the ninth of the month of August. And I distinctly prohibit you from asking any more questions until the tenth of the same.”
I was, if the truth were told, very weak indeed, and my eyes soon closed involuntarily. I did require a good night’s rest, and I went off reflecting at the last moment that my perilous adventure in the interior of the earth, in total darkness, had lasted four days!
On the morning of the next day, at my awakening, I began to look around me. My sleeping place, made of all our traveling bedding, was in a charming grotto, adorned with magnificent stalagmites, glittering in all the colors of the rainbow, the floor of soft and silvery sand.
A dim obscurity prevailed. No torch, no lamp was lighted, and yet certain unexplained beams of light penetrated from without, and made their way through the opening of the beautiful grotto.