On the 13th the Dido anchored off Tanjong Poe, outside the bar at the entrance of the river leading to Mr. Brooke's residence and seat of government, at the town of Sarawak, situated about twenty-four miles up. At half-tide on the following morning we crossed the bar, carrying no less than three and a half fathoms, and entered the beautiful river of Morotaba, which we ran up for the first fifteen miles under all sail, with a fresh, leading breeze. The Dido was the first square-rigged vessel that had ever entered those waters. We came to at the junction river which unites the two principal entrances to the Sarawak. In the evening our boats returned on board from their expedition, having reached Sarawak the day previous by the western entrance. On leaving the Dido, on the morning of the 8th, they proceeded to the Island of Marundum, a favorite rendezvous for pirates, where they came on a fleet of the Illanum tribe, who, however, did not give them an opportunity of closing; but, cutting their sampans adrift, made a precipitate flight, opening fire as they ran out on the opposite side of a small bay, in which they had been watering and refitting. This, of course, led to a very exciting chase, with a running fire kept up on both sides; but the distance was too great for the range of the guns on either side; and the pirates, who, in addition to sailing well, were propelled by from forty to sixty oars each, made their escape. It was not until nearly hull-down that they (probably out of bravado) ceased to fire their stern guns. As they went in the direction of the Natunas, our boats steered for those islands, and anchored under the south end of one of them. At daylight next morning, although in three fathoms water, the pinnace, owing to the great rise and fall of tide, grounded on a coral reef, and Lieutenant Horton and Mr. Brooke proceeded in one of the cutters to reconnoiter. As they neared the s.w. point, they were met by six prahus, beating their tom-toms as they advanced, and making every demonstration of fighting. Lieutenant Horton judiciously turned to rejoin the other boats; and the pinnace having, fortunately, just then floated, he formed his little squadron into line abreast, cleared for action, and prepared to meet his formidable-looking antagonists. Mr. Brooke, however, whose eye had been accustomed to the cut and rig of all the boats in these seas, discovered that those advancing were not Illanuns, and fancied there must be some mistake. The Natunas people had been trading with Sarawak, and he was intimately acquainted with a rich and powerful chief who resided on the island; he therefore raised a white flag of truce on his spy-glass, and from the bow of the pinnace hailed, waved, and made all the signs he could to warn them of the danger into which they were running; but a discharge of small arms was the only reply he got. They then detached their three smallest vessels inshore, so as to command a cross-fire, and cut off