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.