That afternoon, Lieutenant Tom Strong left the White House for Hampton Roads. A swift dispatch boat carried him there. He reached the flagship on a lovely, peaceful, spring day, and delivered his dispatches. The boat that had taken him there was to take him back the next morning. He was glad to have a night on a warship. It was a new experience. And his father had told him that experience was the best teacher in the world. The beautiful lines of the frigate were a joy to see. Her spick and span cleanliness, the trim and trig sailors and marines, the rows of polished cannon that thrust their grim mouths out of the portholes, these things delighted him. He was standing on the quarter-deck with Lieutenant Morris, almost wishing he could exchange his brand-new lieutenancy in the army for one in the navy, when from the Norfolk navy yard a rocket flared up into the air. "What is that, sir?" asked Tom. "Is it a signal to you?" "I fancy it is," Morris answered, "but it isn't meant to be. That's a rebel rocket. You know we lost the navy-yard early in the war and we haven't got it back--yet. That rocket went up from there. The Secesh are up to some deviltry. They've been signaling a good bit of late. I wish they'd come out and give us a chance at them. Hampton Roads is dull as ditchwater, with not a thing happening." The gallant lieutenant yawned prodigiously. He little knew what terrible things were to happen on the morrow. That rocket meant that the rebel ram, the "Merrimac," the first iron-clad vessel that ever went into action, was to sail down Hampton Roads, where nothing ever happened, the next morning and was to make many things happen. The Confederates had converted the old Union frigate, the "Merrimac," into a new, strange, and monstrous thing. They had placed a battery of cannon of a size never before mounted on shipboard upon her deck, close to the water-line; they had built over the battery a framework of stout timbers, covered with armor rolled from rails, and they had put a cast-iron bow upon this marine marvel. A wooden ship was a mere toy to her. The next morning came--it was March 8, 1862--and the "Merrimac" came. As she emerged from distance and mist, our scout-boats came racing to the "Cumberland" with news of the danger that was fast nearing her. The news was a tonic to officers and to men. Here at last was something to fight. Here at last was something to do. They were all weary of having the flagship lie, week after week, "As idle as a painted ship Upon a painted ocean."