Fort Sullivan was the chief work in the harbor, and against this Parker began a vigorous cannonade early on the morning of the 28th of June. The fort had been built of logs of palmetto wood, and was looked upon with some distrust by its defenders, who did not know how well that material could withstand cannon-shot; but the opening volley of the fleet re-assured them. The balls penetrated deep in the soft, spongy wood without detaching any of the splinters, which, in a battle, are more dangerous than the shot themselves. The fort soon replied to the fire of the fleet; and the thunder of three hundred cannon rang out over the bay, while dense clouds of sulphurous smoke hid the scene from the eager gaze of the crowds of people on the housetops of the city. When the stately ships of the British squadron swung into line before the little wooden fort, there was hardly a sailor who did not take his station without a feeling of contempt for the insignificant obstacle that they were about to sweep from their path. But as the day wore on, and the ceaseless cannonade seemed to have no effect on the bastions of the fort, the case began to look serious. "Mind the commodore, and the fifty-gun ships," was the command Moultrie gave to the gunners in the fort when the action commenced, and right well did they heed the injunction. The quarter-decks of the ships-of-the-line were swept clean of officers. The gunners in the fort soon found that the fire of the enemy was doing little or no execution, and they sighted their guns as coolly as though out for a day's target practice. The huge iron balls crashed through the hulls of the ships, or swept their decks, doing terrific execution. The cable of the "Bristol" was shot away, and she swung round with her stern to the fort. In this position she was raked repeatedly; her captain was killed, and at one time not an officer remained on her quarter-deck except the admiral Sir Peter Parker. When the conflict ceased, this ship alone contained forty killed and seventy-one wounded men. The other ships suffered nearly as severely. The twenty-eight-gun ship "Actaeon" grounded during the course of the engagement; and when, after ten hours' fruitless cannonading, the British abandoned the task of reducing the fort, and determined to withdraw, she was found to be immovable. Accordingly Admiral Parker signalled to her officer to abandon the ship, and set her on fire. This was accordingly done; and the ship was left with her colors flying, and her guns loaded. This movement was observed by the Americans, who, in spite of the danger of an explosion, boarded the ship, fired her guns at the "Bristol," loaded three boats with stores, and pulled away, leaving the "Actaeon" to blow up, which she did half an hour later.