The wheel was in charge of an old quartermaster who knew Callao Bay as intimately as he did Valparaiso harbour; and as Jim stood beside him in the tiny shelter, watching him peer through the darkness and ever and anon give the wheel a slight turn this way or that, he realised that he had on board most of the elements which go to make up success. Luck was all that was wanting; and, as fortune is supposed to favour the brave, Jim had high hopes of bringing his expedition to a successful issue.

Away through the blackness swept the little torpedo-boat, with not a light showing anywhere on board her. The men had even been forbidden to smoke; and the stokers down below put coal on as carefully as though the furnaces were a lady’s drawing-room fire, so that there might be no flicker of flame hovering over the top of the funnel, or even so much as a spark to betray their whereabouts. In a little less than half an hour after leaving the Blanco Encalada the Janequeo sneaked round the south-east corner of San Lorenzo Island, being very careful not to collide with the big buoys which marked each Chilian vessel’s moorings. These passed, she slid in between San Lorenzo and Fronton, and entered the Boqueron Passage, coming in sight of the small lighthouse which was, strangely enough, still allowed to show its light at the back of the Dos de Mayo battery. Luckily for the daring little vessel searchlights had not yet come into vogue, or she could scarcely have hoped to escape discovery, for when she crossed the Camotal Bank, previous to turning to starboard in order to run up Callao Bay, she was so close inshore that her crew could plainly hear the shouts of the Peruvian soldiers who occupied the Mayo battery, and who were evidently holding a high carousal. For this circumstance Jim thanked his lucky stars, for there was the less likelihood of any men being on watch; while the noise they were making would prevent them from hearing, as a careful listener might have done, the throbbing of the Janequeo’s engines and the churning of her propeller.

Just as they had rounded the point, however, and the boat had turned her nose north-east, the bacchanalian sounds from the battery suddenly ceased, and lights began to flicker among the earthworks. Jim felt his heart stand still, for discovery now would mean the utter ruin of his project, to say nothing of the death of all of them; for a shot from one of those enormous 20-inch guns would send the frail Janequeo to the bottom like a stone, if it chanced to hit her. And evidently the Peruvians in that particular battery had taken alarm at something; for a tiny point of light appeared on the ramparts, and then quickly flared up into a bright blaze. A beacon-fire had been lighted, and at any moment now its glare might reveal the presence of the torpedo-boat to the Peruvians.

Jim immediately passed the word down to the engine-room for all the steam she could carry, and the little vessel’s speed at once increased by a knot or two. They were nearly in safety now, being about five hundred yards beyond the point, and a few minutes more would take them under the shadow of the higher ground upon which the Pierola battery was placed, when the glare from the beacon would be unable to reach them. But Jim’s great fear now was lest the other batteries also might take the alarm and light their beacons; in which case he could not possibly escape discovery.

By a happy chance, however, the Janequeo glided into the deep shadow, unobserved; and Jim now ordered the speed to be reduced so that the boat should not make so much “fuss” in going through the water, when she stole along at a speed of about ten knots, fifteen being her maximum, of which she was quite capable, as she was a perfectly new boat. The men in Pierola, being half a mile away from the Mayo battery, had evidently not noticed the beacon light, nor were their suspicions aroused, for all was perfectly quiet as the Janequeo crept safely past, with not a light gleaming anywhere in the battery to show that anybody was awake. This battery and the two lying next to it, to the north, had, as it happened, borne the brunt of the fighting that day, and presumably the men were overcome by fatigue. Next, the Torre del Merced and Fort Santa Rosa were safely passed, and the lights of Callao itself swung in sight; the railway station, which lay close to the waterside, was particularly brilliantly lighted, while the sounds proceeding therefrom seemed to indicate that troops were either arriving at, or were being dispatched from, the place.

They were now only about a quarter of a mile from the southern end of the mole, and Douglas passed the word round for his crew to hold themselves in readiness, although the entrance to the harbour where the ships were lying was still half a mile distant, the mole being nearly five hundred yards in length. The queer-shaped bombs were then got up on deck, and Jim busied himself upon the task of attaching the fuses to them. He was obliged to work by the sense of touch alone, as he dared not, of course, use a light of any description. By the time that he had finished his preparations the Janequeo had almost reached the northern end of the mole, and the moment was at hand for the great attempt to be made. Douglas now lessened speed still further, for he did not quite know what shape the defences to the harbour would take. He anticipated that there would almost certainly be a number of floating mines to pass through; and it was more than likely that a patrol of the place might be maintained by launches steaming with their lights out.

A few minutes later the adventurers arrived abreast the northern end of the mole, and were made aware of the fact by a slight diminution of the pitchy blackness caused by the wall of the mole being left on their starboard quarter. The light on the pierhead was, of course, extinguished while hostilities were in progress; for the Peruvians were much too sensible to leave any beacon by which an enemy might easily make the mouth of the harbour. Jim could now see the forest of spars belonging to the ships which he had come to destroy outlined against the luminous haze formed by the lights of the town, although his own little craft was shrouded in dense blackness; and he ordered the man at the wheel to port his helm a few spokes, upon which the Janequeo turned gradually to starboard until she came abreast of the harbour entrance, which was only about two hundred feet in width. He then stopped his engines altogether, and, when the torpedo-boat had come to a standstill, he proceeded to listen with all intentness for suspicious sounds. But everything was as still as the grave, and Douglas began to hug to himself the conviction that events seemed to be turning out fortunately. He could hear no sounds aboard the Peruvian warships; and there was no sign of any patrol launches being about. Having, therefore, taken all the precautions in his power, he started his engines once more and went ahead, dead slow, turning to starboard until the Janequeo’s bows pointed straight for the harbour entrance. Nearer and nearer she stole, while her crew waited in readiness for action, every muscle tense and quivering with anticipation and excitement. The bombs had been ranged in two lines of six each, one on the port and one on the starboard side, so that there would be no need to carry them far, whichever side the torpedo-boat presented to the enemy.

She was gliding through the water at a speed of about five knots when, suddenly, there was a slight grating sound, the Janequeo’s bows lifted out of the water, and the boat came to a dead stop, with her screw still slowly churning up the water astern. The shock caused some of the men on deck to lose their footing, and the whole row of bombs on the port side splashed overboard as the Janequeo heeled in that direction. In a second Jim was on his feet and, rushing to the engine-room, bade the man in charge to stop his engines. Then he dashed on deck again, half expecting to hear the crash of guns opening fire upon him, while he listened intently in order to ascertain whether his presence had been betrayed by the disturbance.

There was no sound of alarm, however; and Douglas presently realised that, strange as it appeared, the Janequeo was still undiscovered. Then, silently, he and his men set about the task of discovering what had caused the obstruction, and they were not long in finding that a stout chain had been stretched across the entrance evidently to prevent just such an attack as this, and that the Janequeo had run in upon this chain where it “sagged” in the middle, her momentum carrying her right up on to it, for her fore-foot was nearly out of the water. Thus they were in a particularly perilous predicament, for if they were discovered now no power on earth could save them; but Jim was thankful beyond measure that he had not been running in at full speed, otherwise the Janequeo would most certainly have broken her back and sunk on the instant. The loss of half the bombs was very serious too, but he still had six of them left, and if he could sink a ship with each he would not have done so badly on the whole.

The question now, however, was, how were they going to get clear of the chain, and, once clear, how were they going to surmount the obstacle and get into the harbour? But, “one thing at a time,” thought Douglas. Let them get off the chain first of all; and that without breaking the torpedo-boat in half or alarming the enemy. He listened again intently for any sound which would indicate that the Peruvians were stirring, and then, hearing nothing, he sent his engines astern at full speed, with the concentrated energy of a quarter of an hour’s pent-up steam. The water frothed and boiled under the boat’s counter, making, in the intense stillness of the night, such a disturbance that Jim thought it must be heard all over the town; but, although the boat rocked from side to side under the strain, grinding her keel and bilges against the chain, she remained immovably fixed; and Jim ordered the engines to be stopped, feeling that so violent a disturbance of the water must speedily lead to their detection.