The position of the Genoese in Galata was a singular one. The city was entirely theirs and under their government. It was surrounded by strong walls which were built on the slope of the steep hill and with those on the side of the Golden Horn formed a large but irregular triangle. The highest position in the city was crowned by the noble tower still existing, and then known as the Tower of Christ. Constantinople and Galata were each interested in keeping the splendid natural harbour closed. Behind Galata—that is, immediately behind the walls of the city—the heights and all the back country were held by the Turks.
Like most neutrals, the people of Galata were accused by each of the combatants of giving aid to the other side. The archbishop, himself a Genoese by origin, is loud in his complaints against his countrymen for having preferred their interests to their duty as Christians. But it is abundantly clear that the Genoese continued to trade with their neighbours across the Golden Horn. Whether the balance of services rendered to the combatants was in favour of the Greeks or of Mahomet may be doubtful, but there was no doubt in Mahomet’s mind, or probably in that of any one else, that the sympathy of the Genoese, as shown by their conduct, was with their fellow Christians. The Genoese ships with which the fight had just taken place were safe once they had passed the boom and had come under the protection of the Genoese on one side and the Greeks on the other. The Golden Horn was thus a refuge for all ships hostile to the Turks.
It was necessary to give the Podestà and the Council of Galata a lesson. But Mahomet had tried and failed to force the boom. Nor could he obtain possession of the end which was within boundaries of Galata.[308] To have made the attempt would have been to make war on the Genoese. But their walls were strong, their defenders brave, and the first rumour of an attack upon the city would be the signal for the despatch of the whole Genoese fleet and of all the forces that the suzerain lord of Galata, the duke of Milan, could muster for their aid. Moreover, within the harbour there were between twenty and thirty large fighting ships, and the sea fight had now shown clearly how very much his difficulties would be increased if he forced the Genoese into open hostilities against him.
The third reason why Mahomet wanted command of the harbour was to secure his own communications. His important division of troops under Zagan Pasha occupied the northern shore of the Golden Horn beyond Galata, together with the heights above the city. While it was necessary to hold this position so as to keep in touch with his fleet at the Double Columns and his fortresses at Roumelia-Hissar, the only means of communication between the main body of his troops encamped before the walls and those under Zagan was the distant and dangerous ford over the upper portion of the Golden Horn at Kiat-Hana, then called Cydaris. Once Mahomet obtained possession of the harbour he could without interruption build a bridge over the upper end of the Golden Horn by which communications between the two divisions of his army would be greatly facilitated.
To accomplish these three objects Mahomet judged that his wisest course was to let the Genoese severely alone and to attempt to obtain possession of the harbour by a method which should not force the neutrals to become open enemies. He resolved to accomplish the difficult feat of transporting a fleet overland from the Bosporus to the Horn. This feat may have been suggested to him by a Venetian who, fourteen years earlier, had seen one of a similar kind performed, in which his fellow citizens had transported a number of ships from the Adige to Lake Garda.[309]
The sultan’s entire command of the country behind Galata would enable him to make his preparations possibly without even the knowledge of the Genoese. The ridge of hills now occupied by Pera was covered partly with vineyards and partly with bushes. The western slope, from the ridge along which runs the Grande Rue de Péra, down to the ‘Valley of the Springs,’ now known as Cassim Pasha, was used as a Genoese graveyard, and is still covered by the cypress trees that mark the Turkish cemetery which took its place. There existed a path from a place on the Bosporus near the present Tophana to The Springs at right angles to the road on the ridge of Pera Hill, the two roads forming a cross and thus giving to Pera its modern Greek name of Stavrodromion. This path followed the natural valley, now forming the street by the side of which is erected the church which is a memorial to British soldiers and sailors who perished in the Crimean war, and then crossing the ridge on a flat tableland over a few hundred yards descended in almost a straight line by another valley which is also preserved by a street to The Springs and the waters of the Golden Horn. It was probably along this route that the sultan had determined to haul his ships.
Project not formed hastily.
It is impossible to believe that Mahomet had arrived hastily at his decision to accomplish this serious engineering feat. In accordance with his usual habit, he would guard his design with the utmost secrecy. At the same time, he would push on his preparations with his customary energy. The timber needed for making a species of tramway, for rollers and for ship cradles, had been carefully and secretly amassed and everything was ready for execution when the leader gave the word. The plan and execution was a great surprise, not only to the Greeks, but even to the people of Galata. That the plan and preparations were conceived and completed in a single day or night is incredible.[310]
Mahomet diverts attention from project.
If this conjecture is correct, Zagan, who was in command of the Turks behind Galata and at the head of the Golden Horn, would have been able to prevent the preparations from becoming known. Possibly it was in order to conceal the final arrangements that the sultan, a few days previously, had brought his guns or bombards to bear on the ships which were moored to the boom, while Baltoglu, as we have seen, was attacking them from the sea. These guns were stationed on the hill of St. Theodore, northward of the eastern wall of Galata.[311] At daylight on April 21, one of them opened fire. The discharge of cannon was continued and would divert attention from what was going on behind the Galata walls. The first shot caused great alarm. The ball, followed by dense black smoke, went over the houses of the Genoese and made them fear that the city itself was about to be attacked. The second shot rose to a great distance, fell upon one of the ships at the boom, smashed a hole in it and sank it, killing some of the crew. The effect upon the crews of the other ships was for the moment to cause consternation. They, however, soon placed themselves out of range. The Turks continued to fire, though the balls fell short, and, according to Leonard, this fire was continued during the day. A hundred cannon-balls were discharged; many houses in Galata were struck and a woman was killed. The Genoese were thus decoyed into paying no attention to what was going on behind their city. During all the same day, Barbaro records that the bombardment against the San Romano walls was exceptionally heavy, and even during the night, according to Michael the Janissary, all the batteries directed against the Constantinople landward walls were kept hard at work. This, too, was probably intended to divert attention from the preparations for the immediate transport of the fleet.