When all Constantine's preparations for defence were completed, he found himself obliged to man a line of wall on the land side of about five miles in length, every point of which was exposed to a direct attack. The remainder of the wall toward the port and the Propontis exceeded nine miles in extent, and his whole garrison hardly amounted to nine thousand men. His fleet consisted of only twenty galleys and three Venetian galeases, but the entry of the port was closed by a chain, the end of which, on the side of Galata, was secured in a strong fort of which the Greeks kept possession. During the winter the Emperor sent out his fleet to ravage the coast of the Propontis as far as Cyzicus, and the spirit of the Greeks was roused by the booty they made in these expeditions. Mahomet II spent the winter at Adrianople, preparing everything necessary for commencing the siege with vigor. His whole mind was absorbed by the glory of conquering the Roman Empire and gaining possession of Constantinople, which for more than eleven hundred fifty years had been the capital of the East. While the fever of ambition inflamed his soul, his cooler judgment also warned him that the Ottoman power rested on a perilous basis as long as Constantinople, the true capital of his empire, remained in the hands of others. Mahomet could easily assemble a sufficient number of troops for his enterprise, but it required all his activity and power to collect the requisite supplies of provisions and stores for the immense military and naval force he had ordered to assemble, and to prepare the artillery and ammunition necessary to insure success. Early and late, in his court and in his cabinet, the young Sultan could talk of nothing but the approaching siege. With the writing-reed and a scroll of paper in his hand he was often seen tracing plans of the fortifications of Constantinople, and marking out positions for his own batteries. Every question relating to the extent and locality of the various magazines to be constructed in order to maintain the troops was discussed in his presence; he himself distributed the troops in their respective divisions and regulated the order of their march; he issued the orders relating to the equipment of the fleet, and discussed the various methods proposed for breaching, mining, and scaling the walls. His enthusiasm was the impulse of a hero, but the immense superiority of his force would have secured him the victory with any ordinary degree of perseverance.