Half an hour after they had all arrived at the southeast angle of the lake, on Prospect Heights. At this point the examination of the banks of the lake was considered finished, and yet the engineer had not been able to discover how and where the waters were discharged. “There is no doubt this overflow exists,” he repeated, “and since it is not visible it must go through the granite cliff at the west!”
“But what importance do you attach to knowing that, my dear Cyrus?” asked Gideon Spilett.
“Considerable importance,” replied the engineer; “for if it flows through the cliff there is probably some cavity, which it would be easy to render habitable after turning away the water.”
“But is it not possible, captain, that the water flows away at the bottom of the lake,” said Herbert, “and that it reaches the sea by some subterranean passage?”
“That might be,” replied the engineer, “and should it be so we shall be obliged to build our house ourselves, since nature has not done it for us.”
The colonists were about to begin to traverse the plateau to return to the Chimneys, when Top gave new signs of agitation. He barked with fury, and before his master could restrain him, he had plunged a second time into the lake.
All ran towards the bank. The dog was already more than twenty feet off, and Cyrus was calling him back, when an enormous head emerged from the water, which did not appear to be deep in that place.
Herbert recognized directly the species of amphibian to which the tapering head, with large eyes, and adorned with long silky mustaches, belonged.
“A lamantin!” he cried.
It was not a lamantin, but one of that species of the order of cetaceans, which bear the name of the “dugong,” for its nostrils were open at the upper part of its snout. The enormous animal rushed on the dog, who tried to escape by returning towards the shore. His master could do nothing to save him, and before Gideon Spilett or Herbert thought of bending their bows, Top, seized by the dugong, had disappeared beneath the water.
Neb, his iron-tipped spear in his hand, wished to go to Top’s help, and attack the dangerous animal in its own element.
“No, Neb,” said the engineer, restraining his courageous servant.
Meanwhile, a struggle was going on beneath the water, an inexplicable struggle, for in his situation Top could not possibly resist; and judging by the bubbling of the surface it must be also a terrible struggle, and could not but terminate in the death of the dog! But suddenly, in the middle of a foaming circle, Top reappeared. Thrown in the air by some unknown power, he rose ten feet above the surface of the lake, fell again into the midst of the agitated waters, and then soon gained the shore, without any severe wounds, miraculously saved.
Cyrus Harding and his companions could not understand it. What was not less inexplicable was that the struggle still appeared to be going on. Doubtless, the dugong, attacked by some powerful animal, after having released the dog, was fighting on its own account. But it did not last long. The water became red with blood, and the body of the dugong, emerging from the sheet of scarlet which spread around, soon stranded on a little beach at the south angle of the lake. The colonists ran towards it. The dugong was dead. It was an enormous animal, fifteen or sixteen feet long, and must have weighed from three to four thousand pounds. At its neck was a wound, which appeared to have been produced by a sharp blade.
What could the amphibious creature have been, who, by this terrible blow had destroyed the formidable dugong? No one could tell, and much interested in this incident, Harding and his companions returned to the Chimneys.
Chapter 17
The next day, the 7th of May, Harding and Gideon Spilett, leaving Neb to prepare breakfast, climbed Prospect Heights, while Herbert and Pencroft ascended by the river, to renew their store of wood.
The engineer and the reporter soon reached the little beach on which the dugong had been stranded. Already flocks of birds had attacked the mass of flesh, and had to be driven away with stones, for Cyrus wished to keep the fat for the use of the colony. As to the animal’s flesh it would furnish excellent food, for in the islands of the Malay Archipelago and elsewhere, it is especially reserved for the table of the native princes. But that was Neb’s affair.
At this moment Cyrus Harding had other thoughts. He was much interested in the incident of the day before. He wished to penetrate the mystery of that submarine combat, and to ascertain what monster could have given the dugong so strange a wound. He remained at the edge of the lake, looking, observing; but nothing appeared under the tranquil waters, which sparkled in the first rays of the rising sun.
At the beach, on which lay the body of the dugong, the water was tolerably shallow, but from this point the bottom of the lake sloped gradually, and it was probable that the depth was considerable in the center. The lake might be considered as a large center basin, which was filled by the water from the Red Creek.
“Well, Cyrus,” said the reporter, “there seems to be nothing suspicious in this water.”
“No, my dear Spilett,” replied the engineer, “and I really do not know how to account for the incident of yesterday.”
“I acknowledge,” returned Spilett, “that the wound given this creature is, at least, very strange, and I cannot explain either how Top was so vigorously cast up out of the water. One could have thought that a powerful arm hurled him up, and that the same arm with a dagger killed the dugong!”
“Yes,” replied the engineer, who had become thoughtful; “there is something there that I cannot understand. But do you better understand either, my dear Spilett, in what way I was saved myself—how I was drawn from the waves, and carried to the downs? No! Is it not true? Now, I feel sure that there is some mystery there, which, doubtless, we shall discover some day. Let us observe, but do not dwell on these singular incidents before our companions. Let us keep our remarks to ourselves, and continue our work.”
It will be remembered that the engineer had not as yet been able to discover the place where the surplus water escaped, but he knew it must exist somewhere. He was much surprised to see a strong current at this place. By throwing in some bits of wood he found that it set towards the southern angle. He followed the current, and arrived at the south point of the lake.
There was there a sort of depression in the water, as if it was suddenly lost in some fissure in the ground.
Harding listened; placing his ear to the level of the lake, he very distinctly heard the noise of a subterranean fall.
“There,” said he, rising, “is the discharge of the water; there, doubtless, by a passage in the granite cliff, it joins the sea, through cavities which we can use to our profit. Well, I can find it!”
The engineer cut a long branch, stripped it of its leaves, and plunging it into the angle between the two banks, he found that there was a large hole one foot only beneath the surface of the water. This hole was the opening so long looked for in vain, and the force of the current was such that the branch was torn from the engineer’s hands and disappeared.
“There is no doubt about it now,” repeated Harding. “There is the outlet, and I will lay it open to view!”
“How?” asked Gideon Spilett.
“By lowering the level of the water of the lake three feet.”
“And how will you lower the level?”
“By opening another outlet larger than this.”
“At what place, Cyrus?”
“At the part of the bank nearest the coast.”
“But it is a mass of granite!” observed