The expedition was immediately to start to examine the island in front of the batteries. The plan was simple in the extreme, should shelter be found on the island, it was proposed to plant a rocket battery behind it, and as the ships came down to throw up showers of rockets into the fort, so as to drive the Spaniards from their guns till the whole fleet had passed.
Evening was drawing on, the boat was ready, the English and French commodores, Lieutenant Mackinnon, the designer of the scheme, Jack, and several other officers went in her. The oars were muffled, nothing was said above a whisper, and with just sufficient light for them to see their way, they pulled through the narrow passages between the islands, completely hidden from the western shore, till they had reached the large one directly opposite the batteries, the dim outline of which they could discern between the trees. Just as the boat’s bows touched the oozy bank a loud rustling was heard, and they fully expected that a jaguar was about to spring upon them. The officers drew their swords to defend themselves, for had they ventured to fire a musket or pistol they would have been betrayed. They looked anxiously, not knowing on whom the animal might spring, when greatly to their relief they saw, not a jaguar, but a harmless capybara or water-hog, which plunged into the water and swam to the opposite bank.
The officers now landed, the seniors first stepping on shore, and made their way over swampy ground, through brushwood, to the opposite or western shore of the island, directly under the batteries. They proceeded in silence, crouching down for fear of being perceived, their object being to ascertain what shelter was to be found for the rocket battery which it was proposed to plant.
Greatly to their satisfaction, they discovered that nature, or rather the river itself, when swollen by the rains, had constructed a bank, in every possible way suited for the object in view; indeed it was such, that one hundred men, working for a week, could not have thrown up one to equal it. Everything being thus found as they could wish, they returned to complete the necessary arrangements. Still, of course, not a word of the plan was made known on board the fleet, lest by any means spies might carry it to the ears of Rosas.
The wind was now blowing up the river, so that, even had everything been ready, the fleet of sailing-vessels could not move.
The next night the rocket party, under the command of Lieutenant Mackinnon, the originator of the plan, took their departure in the paddle-box boat of the steamer to which he belonged, consisting of twelve men of the marine artillery, the same number of seamen, and four officers.
Jack, though well inured to danger, could not conceal from himself the risk that must be run, a pistol going off, or the slightest want of caution of the party, might betray them to the enemy, when boats would be sent across to attack them. Though they might make a good fight with their rockets, they would in all probability be cut to pieces before assistance could reach them. In perfect silence the boat left the ship, few, with the exception of those immediately engaged, being aware where she was going. With muffled oars they pulled along the narrow channel amid the reed-covered islands, keeping a lookout lest any of the enemy’s boats might be on the watch. Rosas, however, did not suspect their design, and at length, without accident, they reached the spot at the back of the island, which had been fixed on for effecting a landing. It was a little bay, formed by a point of land on one side of it, running out some twenty feet or more into the stream. Close to this point a large willow-tree had fallen into the river; the boat was run in between the branches, which assisted to conceal her; a number of boughs were also cut and stuck into the shore by her side, some being laid across her, so that she was completely hidden from any passer-by.
As soon as this was done, the party commenced landing the rocket-stands and rockets. The men found it very fatiguing, as they had first to cross a swamp, into which they sank up to their knees, and they then had a considerable distance to go over rough and uneven ground, among thick roots and brushwood, till they reached the bank where the rocket-stands were to be planted. All hands, however, worked without a murmur, and soon had the rocket-stands placed and so directed that the rockets might, as they hoped, just clear the top of the batteries, and fall in among the men at the guns.
The work being accomplished, the men, pretty well knocked up, returned to the boat, where, however, a glass of grog apiece, and some pork and biscuit, soon set them right again. An officer and two men being left to watch the stands and rockets, the rest turned in under a tarpaulin spread over the boat, where they went to sleep. The wind, however, continued blowing up the river, and the fleet could not move. They found that even in daylight they could walk in safety across the island, by crouching down under the bushes till they gained the shelter of the bank. The guards could thus be relieved at stated intervals.
Twenty-eight embrasures, with heavy guns in them, were counted in the forts at the top of the cliffs, instead of the hundred which had been talked of. These, however, if well served, were sufficient to produce fearful damage among the fleet, if not to destroy it entirely. So near were the batteries, that with pocket telescopes the party could distinguish the faces of the people in them. Among others, they discerned General Moncellia, a brother-in-law of Rosas, who drove up in his carriage with four horses and inspected the troops and guns, little suspecting that his enemies were crouching down so near him. The men had, of course, received strict instructions not on any account to show themselves. The second night, while Lieutenant Mackinnon was watching the batteries through his telescope, he observed the sentry suddenly stop and narrowly eye the bank. What was his dismay to find that one of his men had incautiously stepped forward into a spot where he could be seen.