They sailed westward up the coast for a little distance to a place called Puerto Pontin, where they anchored. Here the pirates got their boats out, and took to the oars, "leaving in the ships only a few men to keep them, and conduct them the next day to the port." By the light of lamps and battle lanterns the boats rowed on through the darkness, till at midnight they had came to a station called Estera longa Lemos, a river-mouth a few miles from Porto Bello, "where they all went on shore." After priming their muskets, they set forth towards the city, under the guidance of an English buccaneer, who had been a prisoner at Porto Bello but a little while before. When they were within a mile or two of the town, they sent this Englishmen with three or four companions to take a solitary sentry posted at the city outskirts. If they could not take him, they were to kill him, but without giving the alarm to the inhabitants. By creeping quietly behind him, the party took the sentry, "with such cunning that he had no time to give warning with his musket, or make any other noise." A knife point pressing on his spine, and a gag of wood across his tongue, warned him to attempt no outcry. Some rope-yarn was passed about his wrists, and in this condition he was dragged to Captain Morgan. As soon as he was in the admiral's presence, he was questioned as to the number of soldiers then in the forts, "with many other circumstances." It must have been a most uncomfortable trial, for "after every question, they made him a thousand menaces to kill him, in case he declared not the truth." When they had examined him to their satisfaction, they recommenced their march, "carrying always the said sentry bound before them." Another mile brought them to an outlying fortress, which was built apparently between Porto Bello and the sea, to protect the coast road and a few outlying plantations. It was not yet light, so the pirates crept about the fort unseen, "so that no person could get either in or out." When they had taken up their ground, Morgan bade the captured sentry hail the garrison, charging them to surrender on pain of being cut to pieces. The garrison at once ran to their weapons, and opened a fierce fire on the unseen enemy, thus giving warning to the city that the pirates were attacking. Before they could reload, the buccaneers, "the noble Sparks of Venus," stormed in among them, taking them in their confusion, hardly knowing what was toward. Morgan was furious that the Spaniards had not surrendered at discretion on his challenge. The pirates were flushed with the excitement of the charge. Someone proposed that they "should be as good as their words, in putting the Spaniards to the sword, thereby to strike a terror into the rest of the city." They hustled the Spanish soldiers "into one room," officers and men together. The cellars of the fort were filled with powder barrels. Some ruffian took a handful of the powder, and spilled a train along the ground, telling his comrades to stand clear. His mates ran from the building applauding his device. In another moment the pirate blew upon his musket match to make the end red, and fired the train he had laid, "and blew up the whole castle into the air, with all the Spaniards that were within." "Much the better way of the two," says one of the chroniclers, who saw the explosion.