On the 25th of October the Seamen and Marines were re-embarked; when, following up his farther plans, the Admiral set sail for Trincomale upon the 2d of December, where he arrived the 4th. Early in the succeeding morning the Marines, to whom two field pieces were attached, were again put on shore, and they were soon joined by a body of Seamen, who, with some Seapoy pioneers, instantly formed and marched towards the fort of Trincomale. While its Governor was employed in framing terms of capitulation, Lieut. Samuel Orr, at the head of the Marine Grenadier Company, intrepidly rushed through the gateway, and saved him the trouble of such a discussion--taking prisoners three Officers and 40 men. This bold exploit led to the most important consequences, as the fort commanded, with 10 pieces of cannon, the only place where the requisite stores could be landed for the Army. The enemy's defences now became limited to Fort Ostenburgh, situated on the top of a hill which swept the harbour, and on the summit of another above it, where there was posted an Officer's guard. From this they were driven by a detachment of Seamen and Marines, who in every essay were entrusted to execute those hazardous and honorable duties. A summons was then tendered to the Governor, whose reply was firm. Finding that he was not to be intimidated by threats, a general storm was planned and executed on the 11th by 450 Seamen and Marines, who, in column, and their flanks covered by pioneers, followed by 20 Sailors with scaling ladders, and supported by a reserve of six companies of both descriptions, advanced against the fort early on the morning of that day. These were farther strengthened by some native troops in the rear.