By April 28 everything was ready. Two hours before dawn the two ships with their bales of cotton and wool left the harbour of Galata--that is, the north-eastern portion of the Golden Horn. They were accompanied by the galleys, one under Trevisano and the other under Zacharia Grione. Both captains were experienced and brave men. Trevisano was the captain who had placed himself at the service of the emperor ‘per honor de Dio et per honor di tuta la Christianitade.’ Three swift fustae, each with well-armed and picked men and materials for burning the Turkish fleet, accompanied them. The leading one was commanded by Coco, who had chosen the crew from his own galley. A number of small boats carrying gunpowder and combustibles were to follow. The order was given, as previously arranged, that the ships should go first and the galleys and biremes follow under their shelter. When the expedition started, some at least were surprised to see a bright light flare up from the top of Galata Tower, which was probably rightly judged to be a signal to the Turks that the ships were leaving.[325] Everything was still in profound darkness and no sign or sound came from the Turkish ships to indicate that they were on the alert. While the Christian ships were pulled slowly and silently along, Coco, in his swift fusta, grew impatient at their slow progress. Naturally, says Barbaro, the ships with only forty rowers could not go so fast as did his fusta, which had seventy-two; and, greedy of glory, he drew ahead of them in order that he might have the satisfaction of being first to attack and of being the destroyer of the Turkish fleet. Then suddenly the silence was broken and the Turks showed they were prepared. Their cannon opened fire and Coco’s fusta was struck, but without being much damaged. A minute or two afterwards, however, a better aimed shot hit his vessel, going in at one side, and out at the other. Before you could have said ten paternosters she had sunk.[326] The survivors of his crew were swimming with their light armour and in the darkness for their lives. Many perished, and among them Coco himself. Meantime the guns were directed against the ships. The enemy fired from a short distance and Barbaro tells us that though they could hear the mocking laughter of their foes, they were unable, on account of the darkness and the smoke arising from the cannon and the smouldering cotton and wool of their own ships, to render any assistance. By the time, indeed, the other vessels had come up, the Turks had all their guns in full play and the vessels had enough to do to look after their own safety. Trevisano’s ship, as probably the largest of the galleys, was signalled for attack. Two shots struck and went through her. She half filled with water and had to be deserted, Trevisano and most of his men taking to the water to save their lives. [Sidenote: Attempt fails.]