They were shot down in scores as they attempted to remove the abatis, and in three quarters of an hour from the time the engagement opened the men withdrew for the last time, leaving Donop behind them, mortally wounded. He died three days afterwards, "finishing", to use his own words, "a noble career early." His command had numbered about twenty-five hundred men, one sixth of whom were either killed or wounded. The Americans had but fourteen killed and twenty-three wounded. Two of the vessels which had been sent against Hazelwood, the "Augusta" and the "Merlin", ran aground, and were discovered in that position by the Americans on the 22d. They were at once attacked, and the magazine of the "Augusta" exploded with terrific force. She had been set on fire either by accident or by a shot from the American batteries, and blew up before all of her crew could be removed. It was found impossible to save the "Merlin", and she was fired by her officers and destroyed. [Illustration: THE DESTRUCTION OF THE AUGUSTA. After a painting in gallery of the Hist. Soc. of Pennsylvania, said to have been painted by a French officer. Cf. Wallace's _Col. Wm. Bradford_.] Taught caution by these reverses, Howe made no further effort to capture the forts until he had succeeded in erecting a number of batteries on the Pennsylvania shore within range of Fort Mifflin. On the 10th of November these were opened with serious result to the Americans. The reply from the fort was spirited, and the damage done to it in daytime was repaired during the night. On the first day, Colonel Samuel Smith, of Maryland, who commanded the garrison, was wounded, and was taken to Red Bank. The second in command, Lieutenant-Colonel Russell, was relieved, on account of ill-health, by Major Simeon Thayer, of Rhode Island, and the defence of the fort was continued. On the 15th the "Vigilant", carrying sixteen 24-pounders, and a hulk with three guns of the same capacity, succeeded in passing up the west channel and taking the fort in the rear, while other vessels engaged the fleet. The fort by this time was little more than a mass of ruins. The ammunition was nearly exhausted. Major Fleury, the engineer of the fort, and Major Talbot were wounded; nearly all the guns were dismounted, and whenever the men appeared on the platforms they were picked off by sharpshooters in the shrouds of the vessels. During the night of the 15th the garrison was removed to Red Bank, as preparations were being made to storm the place the next day, and on the morning of the 16th the British took possession of the place. The gallant defence of this fort by about three hundred men called forth commendations from all sides. Swords were voted to Hazelwood and Smith by Congress, while Fleury and Thayer were promoted. Fort Mercer was now the only water-defence held by the Americans. With the object of capturing it, on the 18th Cornwallis marched to Chester and crossed to Billingsport.