the coast. The sinister black flag floated from the peak. The engineer, with his telescope, could see that the four guns on board were pointed at the island. They were evidently ready to fire at a moment's notice. In the meanwhile the -Speedy- remained silent. About thirty pirates could be seen moving on the deck. A few were on the poop; two others posted in the shrouds, and armed with spy-glasses, were attentively surveying the island. Certainly, Bob Harvey and his crew would not be able easily to give an account of what had happened during the night on board the brig. Had this half-naked man, who had forced the door of the powder-magazine, and with whom they had struggled, who had six times discharged his revolver at them, who had killed one and wounded two others, escaped their shot? Had he been able to swim to shore? Whence did he come? What had been his object? Had his design really been to blow up the brig, as Bob Harvey had thought? All this must be confused enough to the convicts' minds. But what they could no longer doubt was that the unknown island before which the -Speedy- had cast anchor was inhabited, and that there was, perhaps, a numerous colony ready to defend it. And yet no one was to be seen, neither on the shore, nor on the heights. The beach appeared to be absolutely deserted. At any rate, there was no trace of dwellings. Had the inhabitants fled into the interior? Thus probably the pirate captain reasoned, and doubtless, like a prudent man, he wished to reconnoitre the locality before he allowed his men to venture there. During an hour and a half, no indication of attack or landing could be observed on board the brig. Evidently Bob Harvey was hesitating. Even with his strongest telescopes he could not have perceived one of the settlers crouched among the rocks. It was not even probable that his attention had been awakened by the screen of green branches and creepers hiding the windows of Granite House, and showing rather conspicuously on the bare rock. Indeed, how could he imagine that a dwelling was hollowed out, at that height, in the solid granite. From Claw Cape to the Mandible Capes, in all the extent of Union Bay, there was nothing to lead him to suppose that the island was or could be inhabited. At eight o'clock, however, the colonists observed a movement on board the -Speedy-. A boat was lowered, and seven men jumped into her. They were armed with muskets: one took the yoke-lines, four others the oars, and the two others, kneeling in the bows, ready to fire, reconnoitred the island. Their object was no doubt to make an examination but not to land, for in the latter case they would have come in larger numbers. The pirates from their look-out could have seen that the coast was sheltered by an islet, separated from it by a channel half a mile in width. However, it was soon evident to Cyrus Harding, on observing the direction followed by the boat, that they would not attempt to penetrate into the channel, but would land on the islet. Pencroft and Ayrton, each hidden in a narrow cleft of the rock, saw them coming directly towards them, and waited till they were within range. The boat advanced with extreme caution. The oars only dipped into the water at long intervals. It could now be seen that one of the convicts held a lead-line in his hand, and that he wished to fathom the depth of the channel hollowed out by the current of the Mercy. This showed that it was Bob Harvey's intention to bring his brig as near as possible to the coast. About thirty pirates, scattered in the rigging, followed every movement of the boat, and took the bearings of certain landmarks which would allow them to approach without danger. The boat was not more than two cables-lengths off the islet when she stopped. The man at the tiller stood up and looked for the best place at which to land. At that moment two shots were heard. Smoke curled up from among the rocks of the islet. The man at the helm and the man with the lead-line fell backwards into the boat. Ayrton's and Pencraft's balls had struck them both at the same moment. Almost immediately a louder report was heard, a cloud of smoke issued from the brig's side, and a ball, striking the summit of the rock which sheltered Ayrton and Pencroft, made it fly in splinters, but the two marksmen remained unhurt. Horrible imprecations burst from the boat, which immediately continued its way. The man who had been at the tiller was replaced by one of his comrades, and the oars were rapidly plunged into the water. However, instead of returning on board as might have been expected, the boat coasted along the islet, so as to round its southern point. The pirates pulled vigorously at their oars that they might get out of range of the bullets. They advanced to within five cables-lengths of that part of the shore terminated by Flotsam Point, and after having rounded it in a semicircular line, still protected by the brig's guns, they proceeded towards the mouth of the Mercy. Their evident intention was to penetrate into the channel, and cut off the colonists posted on the islet, in such a way, that whatever their number might be, being placed between the fire from the boat and the fire from the brig, they would find themselves in a very disadvantageous position. A quarter of an hour passed whilst the boat advanced in this direction. Absolute silence, perfect calm reigned in the air and on the water. Pencroft and Ayrton, although they knew they ran the risk of being cut off, had not left their post, both that they did not wish to show themselves as yet to their assailants, and expose themselves to the -Speedy's- guns, and that they relied on Neb and Gideon Spilett, watching at the mouth of the river, and on Cyrus Harding and Herbert, in ambush among the rocks at the Chimneys. Twenty minutes after the first shots were fired, the boat was less than two cables-lengths off the Mercy. As the tide was beginning to rise with its accustomed violence, caused by the narrowness of the straits, the pirates were drawn towards the river, and it was only by dint of hard rowing that they were able to keep in the middle of the channel. But, as they were passing within good range of the mouth of the Mercy, two balls saluted them, and two more of their number were laid in the bottom of the boat. Neb and Spilett had not missed their aim. The brig immediately sent a second ball on the post betrayed by the smoke, but without any other result than that of splintering the rock. The boat now contained only three able men. Carried on by the current, it shot through the channel with the rapidity of an arrow, passed before Harding and Herbert, who, not thinking it within range, withheld their fire, then, rounding the northern point of the islet with the two remaining oars, they pulled towards the brig. Hitherto the settlers had nothing to complain of. Their adversaries had certainly had the worst of it. The latter already counted four men seriously wounded if not dead; they, on the contrary, unwounded, had not missed a shot. If the pirates continued to attack them in this way, if they renewed their attempt to land by means of a boat, they could be destroyed one by one. It was now seen how advantageous the engineer's arrangements had been. The pirates would think that they had to deal with numerous and well-armed adversaries, whom they could not easily get the better of. Half an hour passed before the boat, having to pull against the current, could get alongside the -Speedy-. Frightful cries were heard when they returned on board with the wounded, and two or three guns were fired with no result. But now about a dozen other convicts, maddened with rage, and possibly by the effect of the evening's potations, threw themselves into the boat. A second boat was also lowered, in which eight men took their places, and whilst the first pulled straight for the islet, to dislodge the colonists from thence, the second manoeuvred so as to force the entrance of the Mercy. The situation was evidently becoming very dangerous for Pencroft and Ayrton, and they saw that they must regain the mainland. However, they waited till the first boat was within range, when two well-directed balls threw its crew into disorder. Then, Pencroft and Ayrton, abandoning their posts, under fire from the dozen muskets, ran across the islet at full speed, jumped into their boat, crossed the channel at the moment the second boat reached the southern end, and ran to hide themselves in the Chimneys. They had scarcely rejoined Cyrus Harding and Herbert, before the islet was overrun with pirates in every direction. Almost at the same moment, fresh reports resounded from the Mercy station, to which the second boat was rapidly approaching. Two, out of the eight men who manned her, were mortally wounded by Gideon Spilett and Neb, and the boat herself, carried irresistibly onto the reefs, was stove in at the mouth of the Mercy. But the six survivors, holding their muskets above their heads to preserve them from contact with the water, managed to land on the right bank of the river. Then, finding they were exposed to the fire of the ambush there, they fled in the direction of Flotsam Point, out of range of the balls. The actual situation was this: on the islet were a dozen convicts, of whom some were no doubt wounded, but who had still a boat at their disposal; on the island were six, but who could not by any possibility reach Granite House, as they could not cross the river, all the bridges being raised. "Hallo," exclaimed Pencroft as he rushed into the Chimneys, "hallo, captain! What do you think of it, now?" "I think," answered the engineer, "that the combat will now take a new form, for it cannot be supposed that the convicts will be so foolish as to remain in a position so unfavourable for them!" "They won't cross the channel," said the sailor. "Ayrton and Mr Spilett's rifles are there to prevent them. You know that they carry more than a mile!" "No doubt," replied Herbert; "but what can two rifles do against the brig's guns?" "Well, the brig isn't in the channel yet, I fancy!" said Pencroft. "But suppose she does come there?" said Harding. "That's impossible, for she would risk running aground and being lost!" "It is possible," said Ayrton. "The convicts might profit by the high tide to enter the channel, with the risk of grounding at low tide, it is true; but then, under the fire from her guns, our posts would be no longer tenable." "Confound them!" exclaimed Pencroft. "It really seems as if the blackguards were preparing to weigh anchor." "Perhaps we shall be obliged to take refuge in Granite House!" observed Herbert. "We must wait!" answered Cyrus Harding. "But Mr Spilett and Neb?" said Pencroft. "They will know when it is best to rejoin us. Be ready, Ayrton. It is yours and Spilett's rifles which must speak now." It was only too true. The -Speedy- was beginning to weigh her anchor, and her intention was evidently to approach the islet. The tide would be rising for an hour and a half, and the ebb current being already weakened, it would be easy for the brig to advance. But as to entering the channel, Pencroft, contrary to Ayrton's opinion, could not believe that she would dare to attempt it. In the meanwhile, the pirates who occupied the islet had gradually advanced to the opposite shore, and were now only separated from the mainland by the channel. Being armed with muskets alone, they could do no harm to the settlers, in ambush at the Chimneys and the mouth of the Mercy; but, not knowing the latter to be supplied with long range rifles, they on their side did not believe themselves to be exposed. Quite uncovered, therefore, they surveyed the islet, and examined the shore. Their illusion was of short duration. Ayrton's and Gideon Spilett's rifles then spoke, and no doubt imparted some very disagreeable intelligence to two of the convicts, for they fell backwards. Then there was a general helter-skelter. The ten others, not even stopping to pick up their dead or wounded companions, fled to the other side of the islet, tumbled into the boat which had brought them, and pulled away with all their strength. "Eight less!" exclaimed Pencroft. "Really, one would have thought that Mr Spilett and Ayrton had given the word to fire together!" "Gentlemen," said Ayrton, as he reloaded his gun, "this is becoming more serious. The brig is making sail!" "The anchor is weighed!" exclaimed Pencroft. "Yes; and she is already moving." In fact, they could distinctly hear the creaking of the windlass. The -Speedy- was at first held by her anchor; then, when that had been raised, she began to drift towards the shore. The wind was blowing from the sea; the jib and the fore-topsail were hoisted, and the vessel gradually approached the island. From the two posts of the Mercy and the Chimneys they watched her without giving a sign of life; but not without some emotion. What could be more terrible for the colonists than to be exposed, at a short distance, to the brig's guns, without being able to reply with any effect? How could they then prevent the pirates from landing? Cyrus Harding felt this strongly, and he asked himself what it would be possible to do. Before long, he would be called upon for his determination. But what was it to be? To shut themselves up in Granite House, to be besieged there, to remain there for weeks, for months even, since they had an abundance of provisions? So far good! But after that? The pirates would not the less be masters of the island, which they would ravage at their pleasure, and in time they would end by having their revenge on the prisoners in Granite House. However, one chance yet remained; it was that Bob Harvey, after all, would not venture his ship into the channel, and that he would keep outside the islet. He would be still separated from the coast by half a mile, and at that distance his shot could not be very destructive. "Never!" repeated Pencroft, "Bob Harvey will never, if he is a good seaman, enter that channel! He knows well that it would risk the brig, if the sea got up ever so little! And what would become of him without his vessel?" In the meanwhile the brig approached the islet, and it could be seen that she was endeavouring to make the lower end. The breeze was light, and as the current had then lost much of its force, Bob Harvey had absolute command over his vessel. The route previously followed by the boats had allowed her to reconnoitre the channel, and she boldly entered it. The pirate's design was now only too evident: he wished to bring her broadside to bear on the Chimneys and from there to reply with shell and ball to the shot which had till then decimated her crew. Soon the -Speedy- reached the point of the islet; she rounded it with ease; the mainsail was braced up, and the brig hugging the wind, stood across the mouth of the Mercy. "The scoundrels! they are coming!" said Pencroft. At that moment, Cyrus Harding, Ayrton, the sailor, and Herbert, were rejoined by Neb and Gideon Spilett. The reporter and his companion had judged it best to abandon the post at the Mercy, from which they could do nothing against the ship, and they had acted wisely. It was better that the colonists should be together at the moment when they were about to engage in a decisive action. Gideon Spilett and Neb had arrived by dodging behind the rocks, though not without attracting a shower of bullets, which had not, however, reached them. "Spilett! Neb!" cried the engineer, "you are not wounded?" "No," answered the reporter; "a few bruises only from the ricochet! But that cursed brig has entered the channel!" "Yes," replied Pencroft, "and in ten minutes she will have anchored before Granite House!" "Have you formed any plan, Cyrus?" asked the reporter. "We must take refuge in Granite House whilst there is still time, and the convicts cannot see us." "That is my opinion, too," replied Gideon Spilett; "but once shut up--" "We must be guided by circumstances," said the engineer. "Let us be off, then, and make haste!" said the reporter. "Would you not wish, captain, that Ayrton and I should remain here?" asked the sailor. "What would be the use of that, Pencroft?" replied Harding. "No. We will not separate!" There was not a moment to be lost. The colonists left the Chimneys. A bend of the cliff prevented them from being seen by those in the brig; but two or three reports, and the crash of bullets on the rock, told them that the -Speedy- was at no great distance. To spring into the lift, hoist themselves up to the door of Granite House, where Top and Jup had been shut up since the evening before, to rush into the large room, was the work of a minute only. It was quite time, for the settlers, through the branches, could see the -Speedy-, surrounded with smoke, gliding up the channel. The firing was incessant, and shot from the four guns struck blindly, both on the Mercy post, although it was not occupied, and on the Chimneys. The rocks were splintered, and cheers accompanied each discharge. However, they were hoping that Granite House would be spared, thanks to Harding's precaution of concealing the windows, when a shot, piercing the door, penetrated into the passage. "We are discovered!" exclaimed Pencroft. The colonists had not, perhaps, been seen; but it was certain that Bob Harvey had thought proper to send a ball through the suspected foliage which concealed that part of the cliff. Soon he redoubled his attack, when another ball having torn away the leafy screen, disclosed a gaping aperture in the granite. The colonists' situation was desperate. Their retreat was discovered. They could not oppose any obstacle to these missiles, nor protect the stone, which flew in splinters around them. There was nothing to be done but to take refuge in the upper passage of Granite House, and leave their dwelling to be devastated, when a deep roar was heard, followed by frightful cries! Cyrus Harding and his companions rushed to one of the windows-- The brig, irresistibly raised on a sort of water-spout, had just split in two, and in less than ten seconds she was swallowed up with all her criminal crew! CHAPTER FOUR. THE COLONISTS ON THE BEACH--AYRTON AND PENCROFT WORK AMID THE WRECK-- CONVERSATION DURING BREAKFAST--PENCROFT'S ARGUMENTS--MINUTE EXAMINATION OF THE BRIG'S HULL--THE POWDER-MAGAZINE UNTOUCHED--NEW RICHES--THE LAST OF THE WRECK--A BROKEN PIECE OF CYLINDER. "She has blown up!" cried Herbert. "Yes! blown up, just as if Ayrton had set fire to the powder!" returned Pencroft, throwing himself into the lift together with Neb and the lad. "But what has happened?" asked Gideon Spilett, quite stunned by this unexpected catastrophe. "Oh! this time, we shall know," answered the engineer quickly. "What shall we know?--" "Later! later! Come, Spilett. The main point is that these pirates have been exterminated!" And Cyrus Harding, hurrying away the reporter and Ayrton, joined Pencroft, Neb, and Herbert on the beach. Nothing could be seen of the brig, not even her masts. After having been raised by the water-spout, she had fallen on her side, and had sunk in that position, doubtless in consequence of some enormous leak. But as in that place the channel was not more than twenty feet in depth, it was certain that the sides of the submerged brig would reappear at low-water. A few things from the wreck floated on the surface of the water. A raft could be seen consisting of spare spars, coops of poultry with their occupants still living, boxes and barrels, which gradually came to the surface, after having escaped through the hatchways, but no pieces of the wreck appeared, neither planks from the deck, nor timber from the hull,--which rendered the sudden disappearance of the -Speedy- perfectly inexplicable. However, the two masts, which had been broken and escaped from the shrouds and stays, came up, with their sails, some furled and the others spread. But it was not necessary to wait for the tide to bring up these riches, and Ayrton and Pencroft, jumped into the boat with the intention of towing the pieces of wreck either to the beach or to the islet. But just as they were shoving off an observation from Gideon Spilett arrested them. "What about those six convicts who disembarked on the right bank of the Mercy?" said he. In fact, it would not do to forget that the six men whose boat had gone to pieces on the rocks, had landed at Flotsam Point. They looked in that direction. None of the fugitives were visible. It was probable that, having seen their vessel engulfed in the channel, they had fled into the interior of the island. "We will deal with them later," said Harding. "As they are armed, they will still be dangerous; but as it is six against six, the chances are equal. To the most pressing business first." Ayrton and Pencroft pulled vigorously towards the wreck. The sea was calm and the tide very high, as there had been a new moon but two days before. A whole hour at least would elapse before the hull of the brig could emerge from the water of the channel. Ayrton and Pencroft were able to fasten the masts and spars by means of ropes, the ends of which were carried to the beach. There, by the united efforts of the settlers the pieces of wreck were hauled up. Then the boat picked up all that was floating, coops, barrels, and boxes, which were immediately carried to the Chimneys. Several bodies floated also. Amongst them, Ayrton recognised that of Bob Harvey, which he pointed out to his companion, saying with some emotion-- "That is what I have been, Pencroft." "But what you are no longer, brave Ayrton!" returned the sailor warmly. It was singular enough that so few bodies floated. Only five or six were counted, which were already being carried by the current towards the open sea. Very probably the convicts had not had time to escape, and the ship lying over on her side, the greater number of them had remained below. Now the current, by carrying the bodies of these miserable men out to sea, would spare the colonists the sad task of burying them in some corner of their island. For two hours, Cyrus Harding and his companions were solely occupied in hauling up the spars onto the sand, and then in spreading the sails, which were perfectly uninjured, to dry. They spoke little, for they were absorbed in their work, but what thoughts occupied their minds! The possession of this brig, or rather all that she contained, was a perfect mine of wealth. In fact, a ship is like a little world in miniature, and the stores of the colony would be increased by a large number of useful articles. It would be, on a large scale, equivalent to the chest found at Flotsam Point. "And besides," thought Pencroft, "why should it be impossible to refloat the brig? If she has only a leak, that may be stopped up; a vessel from three to four hundred tons, why she is a regular ship compared to our -Bonadventure-! And we could go a long distance in her! We could go anywhere we liked! Captain Harding, Ayrton and I must examine her! She would be well worth the trouble!" In fact, if the brig was still fit to navigate, the colonists' chances of returning to their native land was singularly increased. But, to decide this important question, it was necessary to wait until the tide was quite low, so that every part of the brig's hull might be examined. When their treasures had been safely conveyed on shore, Harding and his companions agreed to devote some minutes to breakfast. They were almost famished: fortunately, the larder was not far off, and Neb was noted for being an expeditious cook. They breakfasted, therefore, near the Chimneys, and during their repast, as may be supposed, nothing was talked of but the unexpected event which had so miraculously saved the colony. "Miraculous is the word," repeated Pencroft, "for it must be acknowledged that those rascals blew up just at the right moment! Granite House was beginning to be uncomfortable as a habitation!" "And can you guess, Pencroft," asked the reporter, "how it happened, or what can have occasioned the explosion?" "Oh! Mr Spilett, nothing is more simple," answered Pencroft. "A convict vessel is not disciplined like a man-of-war! Convicts are not sailors. Of course the powder-magazine was open, and as they were firing incessantly, some careless or clumsy fellow just blew up the vessel!" "Captain Harding," said Herbert, "what astonishes me is that the explosion has not produced more effect. The report was not loud, and besides there are so few planks and timbers torn out. It seems as if the ship had rather foundered than blown up." "Does that astonish you, my boy?" asked the engineer. "Yes, captain." "And it astonishes me also Herbert," replied he, "but when we visit the hull of the brig, we shall no doubt find the explanation of the matter." "Why, captain," said Pencroft, "you don't suppose that the -Speedy- simply foundered like a ship which has struck on a rock?" "Why not," observed Neb, "if there are rocks in the channel?" "Nonsense, Neb," answered Pencroft, "you did not look at the right moment. An instant before she sank, the brig, as I saw perfectly well, rose on an enormous wave, and fell back on her larboard side. Now, if she had only struck, she would have sunk quietly and gone to the bottom like an honest vessel." "It was just because she was not an honest vessel!" returned Neb. "Well, we shall soon see, Pencroft," said the engineer. "We shall soon see," rejoined the sailor, "but I would wager my head there are no rocks in the channel. Look here, captain, to speak candidly, do you mean to say that there is anything marvellous in the occurrence?" Cyrus Harding did not answer. "At any rate," said Gideon Spilett, "whether rock or explosion, you will agree, Pencroft, that it occurred just in the nick of time!" "Yes! yes!" replied the sailor, "but that is not the question. I ask Captain Harding if he sees anything supernatural in all this." "I cannot say, Pencroft," said the engineer. "That is all the answer I can make." A reply which did not satisfy Pencroft at all. He stuck to "an explosion," and did not wish to give it up. He would never consent to admit that in that channel, with its fine sandy bed, just like the beach, which he had often crossed at low-water, there could be an unknown rock. And besides, at the time the brig foundered, it was high-water, that is to say, there was enough water to carry the vessel clear over any rocks which would not be uncovered at low tide. Therefore, there could not have been a collision. Therefore, the vessel had not struck. Therefore, she had blown up. And it must be confessed that the sailor's arguments were not without reason. Towards half-past one, the colonists embarked in the boat to visit the wreck. It was to be regretted that the brig's two boats had not been saved; but one, as has been said, had gone to pieces at the mouth of the Mercy, and was absolutely useless; the other had disappeared when the brig went down, and had not again been seen, having doubtless been crushed. The hull of the -Speedy- was just beginning to issue from the water. The brig was lying right over on her side, for her masts being broken, pressed down by the weight of the ballast displaced by the shock, the keel was visible along her whole length. She had been regularly turned over by the inexplicable but frightful submarine action, which had been at the same time manifested by an enormous water-spout. The settlers rowed round the hull, and, in proportion as the tide went down, they could ascertain, if not the cause which had occasioned the catastrophe, at least the effect produced. Towards the bows, on both sides of the keel, seven or eight feet from the beginning of the stem, the sides of the brig were frightfully torn. Over a length of at least twenty feet there opened two large leaks, which it would be impossible to stop up. Not only had the copper sheathing and the planks disappeared, reduced, no doubt, to powder, but also the ribs, the iron bolts, and tree-nails which united them. From the entire length of the hull to the stern the false keel had been separated with unaccountable violence, and the keel itself, torn from the carline in several places, was split in all its length. "I've a notion!" exclaimed Pencroft, "that this vessel will be difficult to get afloat again." "It will be impossible," said Ayrton. "At any rate," observed Gideon Spilett to the sailor, "the explosion, if there has been one, has produced singular effects! It has split the lower part of the hull, instead of blowing up the deck and topsides! These great rents appear rather to have been made by a rock than by the explosion of a powder-magazine." "There is not a rock in the channel!" answered the sailor. "I will admit anything you like, except the rock." "Let us try to penetrate into the interior of the brig," said the engineer; "perhaps we shall then know what to think of the cause of her destruction." This was the best thing to be done, and it was agreed, besides, to take an inventory of all the treasures on board, and to arrange for their preservation. Access to the interior of the brig was now easy. The tide was still going down, and the deck was practicable. The ballast, composed of heavy masses of iron, had broken through in several places. The noise of the sea could be heard as it rushed out at the holes in the hull. Cyrus Harding and his companions, hatchets in hand, advanced along the shattered deck. Cases of all sorts encumbered it, and, as they had been but a very short time in the water, their contents were perhaps uninjured. They then busied themselves in placing all this cargo in safety. The water would not return for several hours, and these hours must be employed in the most profitable way. Ayrton and Pencroft had, at the entrance made in the hull, discovered tackle, which would serve to hoist up the barrels and chests. The boat received them and transported them to the shore. They took the articles as they came, intending to sort them afterwards. At any rate, the settlers saw at once, with extreme satisfaction, that the brig possessed a very varied cargo--an assortment of all sorts of articles, utensils, manufactured goods, and tools--such as the ships which make the great coasting-trade of Polynesia are usually laden with. It was probable that they would find a little of everything, and they agreed that it was exactly what was necessary for the colony of Lincoln Island. However--and Cyrus Harding observed it in silent astonishment--not only, as has been said, had the hull of the brig enormously suffered from the shock, whatever it was, that had occasioned the catastrophe, but the interior arrangements had been destroyed, especially towards the bows. Partitions and staunchions were smashed, as if some tremendous shell had burst in the interior of the brig. The colonists could easily go fore and aft, after having removed the cases as they were extricated. They were not heavy bales, which would have been difficult to remove, but simple packages, of which the stowage, besides, was no longer recognisable. The colonists then reached the stern of the brig--the part formerly surmounted by the poop. It was there that, following Ayrton's directions, they must look for the powder-magazine. Cyrus Harding thought that it had not exploded; that it was possible some barrels might be saved, and that the powder, which is usually enclosed in metal coverings, might not have suffered from contact with the water. This, in fact, was just what had happened. They extricated from amongst a large number of shot twenty barrels, the insides of which were lined with copper. Pencroft was convinced by the evidence of his own eyes that the destruction of the -Speedy- could not be attributed to an explosion. That part of the hull in which the magazine was situated was, moreover, that which had suffered least. "It may be so," said the obstinate sailor; "but as to a rock, there is not one in the channel!" "Then, how did it happen?" asked Herbert. "I don't know," answered Pencroft, "Captain Harding doesn't know, and nobody knows or ever will know!" Several hours had passed during these researches, and the tide began to flow. Work must be suspended for the present. There was no fear of the brig being carried away by the sea, for she was already fixed as firmly as if moored by her anchors. They could therefore, without inconvenience, wait until the next day to resume operations; but, as to the vessel herself, she was doomed, and it would be best to hasten to save the remains of her hull, as she would not be long in disappearing in the quicksands of the channel. It was now five o'clock in the evening. It had been a hard day's work for the men. They ate with good appetite, and, notwithstanding their fatigue, they could not resist, after dinner, their desire of inspecting the cases which composed the cargo of the -Speedy-. Most of them contained clothes, which, as may be believed, were well received. There were enough to clothe a whole colony--linen for every one's use, shoes for every one's feet. "We are too rich!" exclaimed Pencroft. "But what are we going to do with all this?" And every moment burst forth the hurrahs of the delighted sailor when he caught sight of the barrels of gunpowder, fire-arms and side-arms, balls of cotton, implements of husbandry, carpenter's, joiner's, and blacksmith's tools, and boxes of all kinds of seeds, not in the least injured by their short sojourn in the water. Ah, two years before, how these things would have been prized! And now, even although the industrious colonists had provided themselves with tools, these treasures would find their use. There was no want of space in the store-rooms of Granite House, but that daytime would not allow them to stow away the whole. It would not do also to forget that the six survivors of the -Speedy's- crew had landed on the island, for they were in all probability scoundrels of the deepest dye, and it was necessary that the colonists should be on their guard against them. Although the bridges over the Mercy were raised, the convicts would not be stopped by a river or a stream, and, rendered desperate, these wretches would be capable of anything. They would see later what plan it would be best to follow; but in the meantime it was necessary to mount guard over cases and packages heaped up near the Chimneys, and thus the settlers employed themselves in turn during the night. The morning came, however, without the convicts having attempted any attack. Master Jup and Top, on guard at the foot of Granite House, would have quickly given the alarm. The three following days--the 19th, 20th, and 21st of October--were employed in saving everything of value, or of any use whatever, either from the cargo or rigging of the brig. At low tide they overhauled the hold--at high tide they stowed away the rescued articles. A great part of the copper sheathing had been torn from the hull, which every day sank lower. But before the sand had swallowed the heavy things which had fallen through the bottom, Ayrton and Pencroft, diving to the bed of the channel, recovered the chains and anchors of the brig, the iron of her ballast, and even four guns, which, floated by means of empty casks, were brought to shore. It may be seen that the arsenal of the colony had gained by the wreck, as well as the store-rooms of Granite House. Pencroft, always enthusiastic in his projects, already spoke of constructing a battery to command the channel and the mouth of the river. With four guns, he engaged to prevent any fleet, "however powerful it might be," from venturing into the waters of Lincoln Island! In the meantime, when nothing remained of the brig but a useless hulk, bad weather came on, which soon finished her. Cyrus Harding had intended to blow her up, so as to collect the remains on the shore, but a strong gale from the north-east and a heavy sea compelled him to economise his powder. In fact, on the night of the 23rd, the hull entirely broke up, and some of the wreck was cast up on the beach. As to the papers on board, it is useless to say that, although he carefully searched the lockers of the poop, Harding did not discover any trace of them. The pirates had evidently destroyed everything that concerned either the captain or the owners of the -Speedy-, and, as the name of her port was not painted on her counter, there was nothing which would tell them her nationality. However, by the shape of her boats Ayrton and Pencroft believed that the brig was of English build. A week after the catastrophe--or, rather, after the fortunate, though inexplicable, event to which the colony owed its preservation--nothing more could be seen of the vessel, even at low tide. The wreck had disappeared, and Granite House was enriched by nearly all it had contained. However, the mystery which enveloped its strange destruction would doubtless never have been cleared away if, on the 30th of November, Neb, strolling on the beach, had not found a piece of a thick iron cylinder, bearing traces of explosion. The edges of this cylinder were twisted and broken, as if they had been subjected to the action of some explosive substance. Neb brought this piece of metal to his master, who was then occupied with his companions in the workshop of the Chimneys. Cyrus Harding examined the cylinder attentively, then, turning to Pencroft-- "You persist, my friend," said he, "in maintaining that the -Speedy- was not lost in consequence of a collision?" "Yes, captain," answered the sailor. "You know as well as I do that there are no rocks in the channel." "But suppose she had run against this piece of iron?" said the engineer, showing the broken cylinder. "What, that bit of pipe!" exclaimed Pencroft in a tone of perfect incredulity. "My friends," resumed Harding, "you remember that before she foundered the brig rose on the summit of a regular water-spout?" "Yes, captain," replied Herbert. "Well, would you like to know what occasioned that water-spout? It was this," said the engineer, holding up the broken tube. "That?" returned Pencroft. "Yes! This cylinder is all that remains of a torpedo!" "A torpedo!" exclaimed the engineer's companions. "And who put the torpedo there?" demanded Pencroft, who did not like to yield. "All that I can tell you is, that it was not I," answered Cyrus Harding; "but it was there, and you have been able to judge of its incomparable power!" CHAPTER FIVE. THE ENGINEER'S DECLARATION--PENCROFT'S GRAND HYPOTHESIS--AN AERIAL BATTERY--THE FOUR CANNONS--THE SURVIVING CONVICTS--AYRTON'S HESITATION-- CYRUS HARDING'S GENEROUS SENTIMENTS--PENCROFT'S REGRET. So, then, all was explained by the submarine explosion of this torpedo. Cyrus Harding could not be mistaken, as, during the war of the Union, he had had occasion to try these terrible engines of destruction. It was under the action of this cylinder, charged with some explosive substance, nitro-glycerine, picrate, or some other material of the same nature, that the water of the channel had been raised like a dome, the bottom of the brig crushed in, and she had sunk instantly, the damage done to her hull being so considerable that it was impossible to refloat her. The -Speedy- had not been able to withstand a torpedo that would have destroyed an ironclad as easily as a fishing-boat! Yes! all was explained, everything--except the presence of the torpedo in the waters of the channel! "My friends, then," said Cyrus Harding, "we can no longer be in doubt as to the presence of a mysterious being, a castaway like us, perhaps, abandoned on our island, and I say this in order that Ayrton may be acquainted with all the strange events which have occurred during these two years. Who this beneficent stranger is, whose intervention has, so fortunately for us, been manifested on many occasions, I cannot imagine. What his object can be in acting thus, in concealing himself after rendering us so many services, I cannot understand. But his services are not the less real, and are of such a nature that only a man possessed of prodigious power, could render them. Ayrton is indebted to him as much as we are, for, if it was the stranger who saved me from the waves after the fall from the balloon, evidently it was he who wrote the document, who placed the bottle in the channel, and who has made known to us the situation of our companion. I will add that it was he who guided that chest, provided with everything we wanted, and stranded it on Flotsam Point; that it was he who lighted that fire on the heights of the island, which permitted you to land; that it was he who fired that bullet found in the body of the peccary; that it was he who immersed that torpedo in the channel, which destroyed the brig; in a word, that all those inexplicable events, for which we could not assign a reason, are due to this mysterious being. Therefore, whoever he may be, whether shipwrecked, or exiled on our island, we shall be ungrateful, if we think ourselves freed from gratitude towards him. We have contracted a debt, and I hope that we shall one day pay it." "You are right in speaking thus, my dear Cyrus," replied Gideon Spilett. "Yes, there is an almost all-powerful being, hidden in some part of the island, and whose influence has been singularly useful to our colony. I will add that the unknown appears to possess means of action which border on the supernatural if, in the events of practical life, the supernatural were recognisable. Is it he who is in secret communication with us by the well in Granite House, and has he thus a knowledge of all our plans? Was it he who threw us that bottle, when the vessel made her first cruise? Was it he who threw Top out of the lake, and killed the dugong? Was it he, who as everything leads us to believe, saved you from the waves, and that under circumstances in which any one else would not have been able to act? If it was he, he possesses a power which renders him master of the elements." The reporter's reasoning was just, and every one felt it to be so. "Yes," rejoined Cyrus Harding, "if the intervention of a human being is not more questionable for us, I agree that he has at his disposal means of action beyond those possessed by humanity. There is a mystery still, but if we discover the man, the mystery will be discovered also. The question, then, is, ought we to respect the -incognito- of this generous being, or ought we to do everything to find him out? What is your opinion on the matter?" "My opinion," said Pencroft, "is that, whoever he may be, he is a brave man, and he has my esteem!" "Be it so," answered Harding, "but that is not an answer, Pencroft." "Master," then said Neb, "my idea is, that we may search as long as we like for this gentleman whom you are talking about, but that we shall not discover him till he pleases." "That's not bad, what you say, Neb," observed Pencroft. "I am of Neb's opinion," said Gideon Spilett, "but that is no reason for not attempting the adventure. Whether we find this mysterious being or not, we shall at least have fulfilled our duty towards him." "And you, my boy, give us your opinion," said the engineer, turning to Herbert. "Oh," cried Herbert, his countenance full of animation, "how I should like to thank him, he who saved you first, and who has now saved us!" "Of course, my boy," replied Pencroft, "so would I and all of us. I am not inquisitive, but I would give one of my eyes to see this individual face to face! It seems to me that he must be handsome, tall, strong, with a splendid beard, radiant hair, and that he must be seated on the clouds, a great ball in his hands!" "But, Pencroft," answered Spilett, "you are describing a picture of the Creator." "Possibly, Mr Spilett," replied the sailor, "but that is how I imagine him!" "And you, Ayrton?" asked the engineer. "Captain Harding," replied Ayrton, "I can give you no better advice in this matter. Whatever you do will be best, when you wish me to join you in your researches, I am ready to follow you." "I thank you, Ayrton," answered Cyrus Harding, "but I should like a more direct answer to the question I put to you. You are our companion; you have already endangered your life several times for us, and you, as well as the rest, ought to be consulted in the matter of any important decision. Speak, therefore." "Captain Harding," replied Ayrton, "I think that we ought to do everything to discover this unknown benefactor. Perhaps he is alone. Perhaps he is suffering. Perhaps he has a life to be renewed. I, too, as you said, have a debt of gratitude to pay him. It was he, it could be only he who must have come to Tabor Island, who found there the wretch you knew, and who made known to you that there was an unfortunate man there to be saved! Therefore it is, thanks to him, that I have become a man again. No, I will never forget him!" "That is settled, then," said Cyrus Harding. "We will begin our researches as soon as possible. We will not leave a corner of the island unexplored. We will search into its most secret recesses, and will hope that our unknown friend will pardon us in consideration of our intentions!" For several days the colonists were actively employed in haymaking and harvest. Before putting their project of exploring the yet unknown parts of the island into execution, they wished to get all possible work finished. It was also the time for collecting the various vegetables from the Tabor Island plants. All was stowed away, and happily there was no want of room in Granite House, in which they might have housed all the treasures of the island. The products of the colony were there, methodically arranged, and in a safe place, as may be believed, sheltered as much from animals as from man. There was no fear of damp in the middle of that thick mass of granite. Many natural excavations situated in the upper passage were enlarged either by pick-axe or mine, and Granite House thus became a general warehouse, containing all the provisions, arms, tools, and spare utensils--in a word, all the stores of the colony. As to the guns obtained from the brig, they were pretty pieces of ordnance, which, at Pencroft's entreaty, were hoisted by means of tackle and pulleys, right up into Granite House; embrasures were made between the windows, and the shining muzzles of the guns could soon be seen through the granite cliff. From this height they commanded all Union Bay. It was like a little Gibraltar, and any vessel anchored off the islet would inevitably be exposed to the fire of this aerial battery. "Captain," said Pencroft one day, it was the 8th of November, "now that our fortifications are finished, it would be a good thing if we tried the range of our guns." "Do you think that is useful?" asked the engineer. "It is more than useful, it is necessary! Without that how are we to know to what distance we can send one of those pretty shot with which we are provided?" "Try them, Pencroft," replied the engineer. "However, I think that in making the experiment, we ought to employ, not the ordinary powder, the supply of which, I think, should remain untouched, but the pyroxile which will never fail us." "Can the cannon support the shock of the pyroxile?" asked the reporter, who was not less anxious than Pencroft to try the artillery of Granite House. "I believe so. However," added the engineer, "we will be prudent." The engineer was right in thinking that the guns were of excellent make. Made of forged steel, and breech-loaders, they ought consequently to be able to bear a considerable charge, and also have an enormous range. In fact, as regards practical effect, the transit described by the ball ought to be as extended as possible, and this tension could only be obtained under the condition that the projectile should be impelled with a very great initial velocity. "Now," said Harding to his companions, "the initial velocity is in proportion to the quantity of powder used. In the fabrication of these pieces, everything depends on employing a metal with the highest possible power of resistance, and steel is incontestably that metal of all others which resists the best. 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