two o'clock
They saw at last -- another fleet . Clouds of black smoke on the river told the story . Reënforcements had arrived . At half-past two o'clock the fleet formed in line of battle -- threw their big flags to the breeze and dashed squarely on the fort . They swept now within point blank range of three hundred yards , pouring in a storm of shot . But the Confederate batteries were too heavy and too well manned . Fifty-seven shells struck the flagship and more than a hundred took effect on the five boats leading the assault .