The squadron, consisting of a 64, three frigates, and a sloop, went into action with Mud Island at the same time; but, the channel having shifted, owing possibly to the obstructions, the sixty-four and the sloop grounded, and could not be floated that day.
On the 23d the Americans concentrated their batteries, galleys, and fire-rafts upon the two; and the larger ship took fire and blew up in the midst of the preparations for lightening her.

The sloop was then set on fire and abandoned.
So long as this obstacle remained, all supplies for the British army in Philadelphia had to be carried by boats to the shore, and transported considerable distances by land.

As direct attacks had proved unavailing, more deliberate measures were adopted.

The army built batteries, and the navy sent ashore guns to mount in them; but the decisive blow to Mud Island was given by a small armed ship, the _Vigilant_, 20, which was successfully piloted through a channel on the west side of the river, and reached the rear of the work, towing with her a floating battery with three 24-pounders.

This was on the 15th of November.