These pleasures had been continued for five weeks, when a squadron of three heavy war-ships arrived from Spain, and blocked the pirates’ only line of retreat to the sea at Fort San Carlos. Morgan prepared a fire ship, with which he grappled and burned the Spanish admiral. The second ship was wrecked, the third captured by the pirates, and the sailors of the whole squadron were butchered while they drowned. Still Fort San Carlos, now bristling with new guns, had to be dealt with before the pirates could make their escape to the sea. Morgan pretended to attack from the land, so that all the guns were shifted to that side of the fort ready to wipe out his forces. This being done, he got his men on board, and sailed through the channel in perfect safety. [Illustration: SIR HENRY MORGAN] And yet attacks upon such places as Maracaibo were mere trifling, for the Spaniards held all the wealth of their golden Indies at Panama. This gorgeous city was on the Pacific Ocean, and to reach it, one must cross the Isthmus of Darien by the route in later times of the Panama railway and the Panama Canal, through the most unwholesome swamps, where to sleep at night in the open was almost sure death from fever. Moreover, the landing place at Chagres was covered by a strong fortress, the route was swarming with Spanish troops and wild savages in their pay, and their destination was a walled city esteemed impregnable. By way of preparing for his raid, Morgan sent four hundred men who stormed the castle of Chagres, compelling the wretched garrison to jump off a cliff to destruction. The English flag shone from the citadel when Morgan’s fleet arrived. The captain landed one thousand two hundred men and set off up the Chagres River with five boats loaded with artillery, thirty-two canoes and no food. This was a mistake, because the Spaniards had cleared the whole isthmus, driving off the cattle, rooting out the crops, carting away the grain, burning every roof, and leaving nothing for the pirates to live on except the microbes of fever. As the pirates advanced they retreated, luring them on day by day into the heart of the wilderness. The pirates broiled and ate their sea boots, their bandoleers, and certain leather bags. The river being foul with fallen timber, they took to marching. On the sixth day they found a barn full of maize and ate it up, but only on the ninth day had they a decent meal, when, sweating, gasping and swearing, they pounced upon a herd of asses and cows, and fell to roasting flesh on the points of their swords.