At the same time the Venetians attacked the city by sea. Dandolo ranged his fleet in two lines; the galleys were in the first rank, manned by archers, and laden with machines of war; behind the galleys advanced the large vessels, upon which were constructed towers exceeding the loftiest of the walls of Constantinople in height. At daybreak the contest began between the city and the fleet; the Greeks, armed with the Greek fire, the Venetians, covered with their armour, the ramparts and the vessels charged with a thousand destructive instruments, cast from one to the other, by turns, terror, fire, and death. The incessant dashing of the oars, the shocks of the vessels against each other, the cries of the sailors and combatants, the hissing of the stones, javelins, and arrows, the Greek fire darting along the sea, seizing on the ships and boiling upon the waves, presented altogether a spectacle a thousand times more fearful than that of a tempest. Amidst this horrible tumult, Henry Dandolo was heard: standing erect in his galley, he excited his troops, and, with a terrible voice, threatened to hang every man that did not land. The orders of the intrepid doge were soon executed. The men of his galley took him in their arms and bore him swiftly to the shore, the standard of St. Mark floating over him. At sight of this, the efforts of the crews of the other galleys were redoubled, all struck the shore, and the soldiers rushed forward to follow their venerable leader. The vessels, which had hitherto remained motionless, now advanced and placed themselves between the galleys, so that the whole fleet was extended in a single line before the walls of Constantinople, and presented to the terrified Greeks a formidable rampart raised upon the waters. The floating towers lowered their drawbridges upon the ramparts of the city, and whilst, at the foot of the walls, ten thousand arms planted ladders and battered with rams, on the summit a fearful conflict was maintained with sword and lance.