The force assembled for the attack was such as might deter the enemy from attempting resistance, with a sufficient force of small vessels to be equal to the service, if the line-of-battle ships should be unable to get up.  At the entrance of the river, about ten miles up the harbour, the Culloden and Powerful, though they had been previously lightened, and trimmed to an even keel, to equalize their draught of water fore-and-aft, grounded on what was called the bar, and which proved to be a flat, several miles in extent.  Part of their water was started, and their guns, shot, provisions, and whatever would materially lighten them, were removed into three coasting-vessels detained for that purpose; but still they remained fast.  The rest of the squadron, except the troop-ship, which was also aground, crossed the bar, and passing a stockade of large trees, anchored in deep water below the island of Madura.  On the evening of the 6th, Sir Edward, seeing no probability of carrying up the large ships, determined to force the passage, and attack the place without them, and accordingly shifted his flag to the Caroline.  Fortunately, at nine o’clock that night the water began to rise; and by ten, the Culloden was afloat and under sail.  Following a boat with a light, which was directed by Mr. Gaze, the master, she passed the stockade, and by eleven o’clock was anchored above the bar in deep water.  Before daylight, the Admiral returned to her, and all the squadron, except the Powerful and the troop-ship, which had not yet floated, weighed with the sea-breeze, and stood for the narrow passage between Madura and Java.  At half-past eleven, they were engaged with the batteries on the island; but they passed them by half-past twelve, without having received material damage.  At a little past four, the squadron anchored abreast of the Fort of Griessee, but no farther resistance was offered, except a few ineffectual shots fired from that fort at the Culloden; M. Cowell having previously determined to defend the place to the last against the frigates and sloops, but to surrender if the line-of-battle ships got up.  The Powerful joined next day.  In coming up, she was struck from the batteries on Madura with hot shot, but her people extinguished the fire.  The troops took possession of the fort, leaving the town in the hands of the civil authorities:  and on the 9th, the Governor and Council of Somabaya, having thankfully acquiesced in the liberal terms dictated by Sir Edward, all hostilities ceased.  They had promptly released the gentlemen whom the commodore had so unjustifiably detained; and a deputation of three members of their own body accompanied them to the Admiral, to disavow the act of M. Cowell, and to treat for a capitulation.