Immediately after the battle of Brandywine, Admiral Howe sailed for the Delaware, where he expected to arrive in time to meet and co-operate with the army in and about Philadelphia. But the winds were so unfavourable, and the navigation of the bay of Delaware so difficult, that his van did not get into the river until the 4th of October. The ships of war and transports which followed, came up from the sixth to the eighth, and anchored from New Castle to Reedy Island.
The frigates, in advance of the fleet, had not yet succeeded in their endeavours to effect a passage through the lower double row of chevaux-de-frise. Though no longer protected by the fort at Billingsport, they were defended by the water force above, and the work was found more difficult than had been expected. It was not until the middle of October that the impediments were so far removed as to afford a narrow and intricate passage through them. In the mean time, the fire from the Pennsylvania shore had not produced all the effect expected from it; and it was perceived that greater exertions would be necessary for the reduction of the works than could safely be made in the present relative situation of the armies. Under this impression, General Howe, soon after the return of the American army to its former camp on the Skippack, withdrew his troops from Germantown into Philadelphia, as preparatory to a combined attack by land and water on forts Mercer and Mifflin.
After effecting a passage through the works sunk in the river at Billingsport, other difficulties still remained to be encountered by the ships of war. Several rows of chevaux-de-frise had been sunk about half a mile below Mud Island, which were protected by the guns of the forts, as well as by the moveable water force. To silence these works, therefore, was a necessary preliminary to the removal of these obstructions in the channel.
October.
Attack upon Red Bank.
On the 21st of October, a detachment of Hessians, amounting to twelve hundred men, commanded by Colonel Count Donop, crossed the Delaware at Philadelphia, with orders to storm the fort at Red Bank. The fortifications consisted of extensive outer works, within which was an intrenchment eight or nine feet high, boarded and fraized. Late in the evening of the twenty-second. Count Donop appeared before the fort, and attacked it with great intrepidity. It was defended with equal resolution. The outer works being too extensive to be manned by the troops in the fort, were used only to gall the assailants while advancing. On their near approach, the garrison retired within the inner intrenchment, whence they poured upon the Hessians a heavy and destructive fire. Colonel Donop killed and his party repulsed with considerable loss.Colonel Donop received a mortal wound; and Lieutenant Colonel Mengerode, the second in command, fell about the same time. Lieutenant Colonel Minsing, the oldest remaining officer, drew off his troops, and returned next day to Philadelphia. The loss of the assailants was estimated by the Americans at four hundred men. The garrison was reinforced from fort Mifflin, and aided by the galleys which flanked the Hessians in their advance and retreat. The American loss, in killed and wounded, amounted to only thirty-two men.
The Augusta frigate blows up.
The ships having been ordered to co-operate with Count Donop, the Augusta, with four smaller vessels, passed the lower line of chevaux-de-frise, opposite to Billingsport, and lay above it, waiting until the assault should be made on the fort. The flood tide setting in about the time the attack commenced, they moved with it up the river. The obstructions sunk in the Delaware had in some degree changed its channel, in consequence of which the Augusta and the Merlin grounded, a considerable distance below the second line of chevaux-de-frise and a strong wind from the north so checked the rising of the tide, that these vessels could not be floated by the flood. Their situation, however, was not discerned that evening, as the frigates which were able to approach the fort, and the batteries from the Pennsylvania shore, kept up an incessant fire on the garrison, till night put an end to the cannonade. Early next morning it was recommenced, in the hope that, under its cover, the Augusta and the Merlin might be got off. The Americans, on discovering their situation, sent four fire ships against them, but without effect. Meanwhile, a warm cannonade took place on both sides, in the course of which the Augusta took fire, and it was found impracticable to extinguish the flames. Most of the men were taken out, the frigates withdrawn, and the Merlin set on fire; after which the Augusta blew up, and a few of the crew were lost in her.
This repulse inspired congress with flattering hopes for the permanent defence of the posts on the Delaware. That body expressed its high sense of the merits of Colonel Greene of Rhode Island, who had commanded in fort Mercer; of Lieutenant Colonel Smith of Maryland, who had commanded in fort Mifflin; and of Commodore Hazlewood, who commanded the galleys; and presented a sword to each of these officers, as a mark of estimation in which their services were held.
The situation of these forts was far from justifying this confidence of their being defensible. That on Mud Island had been unskilfully constructed, and required at least eight hundred men fully to man the lines. The island is about half a mile long. Fort Mifflin was placed at the lower end, having its principal fortifications in front for the purpose of repelling ships coming up the river. The defences in the rear consisted only of a ditch and palisade, protected by two block-houses, the upper story of one of which had been destroyed in the late cannonade. Above the fort were two batteries opposing those constructed by the British on Province and Carpenter's Islands, which were separated from Mud Island only by a narrow passage between four and five hundred yards wide.