With the departure of the enemy from the river, the completion of his arrangements for the removal of the stores at Georgetown, and the defence of that place, Marion again recrossed the Santee and hurried to Watboo, on the Cooper. This river, leading to Charleston, to which the fleet of the enemy had returned, was naturally thought to be the next which they would attempt to penetrate. He had left a small body of infantry at this place, but this was deemed inadequate to the required duties. But they were sufficient at least to attract the attention of the British. Ignorant of Marion's return, believing him to be still at Georgetown, whither, it was known, he had taken all his cavalry, -- a detachment of dragoons, more than one hundred strong, was sent from Charleston, under Major Frasier, against the post at Watboo. The rapidity of Marion's movements brought him back in season for its safety. It happened unfortunately, that, when he heard of the approach of this detachment, his cavalry were absent, patrolling down the river, maintaining their watch for the British fleet, which was the chief subject of apprehension. This fleet, meanwhile, had gone southwardly, pursuing the object of its former quest up the waters of the Combahee. With the approach of Frasier, Marion dispatched his messengers in search of his cavalry, and to call in his pickets. Some of the latter had joined him before the enemy appeared. Frasier exhibited considerable conduct in making his approaches. He had taken an unfrequented route, and had succeeded in capturing some of the out-sentinels of our partisan.

He advanced upon him in the fullest confidence of effecting a surprise --not of Marion, but of the smaller force under Col. Ashby, which he still believed to be the only force opposed to him.

He was soon undeceived and found his enemy rather stronger than he expected, and drawn up in readiness for his reception. It was about the 25th of August.

Marion lay at the plantation of Sir John Colleton, on the south side of Watboo Creek, and a little above the bridge. The situation pleased him, and it was one of his frequent places of encampment when he happened to be operating in the vicinity. The owner was a loyalist and had left the country.

The mansion and his extensive range of negro houses afforded ample shelter for such a force as that which Marion commanded.

With the gradual advance of Frasier, Marion seems to have been acquainted, but in the absence of his cavalry his only mode of obtaining intelligence was through his officers. These alone, of all the party in camp, were provided with horses. Of these, he ordered out a party under Capt. Gavin Witherspoon to reconnoitre. While they were absent, Marion put his infantry in order of battle. The main body occupied an avenue of venerable cedars, which, neglected during the war, in their untrimmed state, stood overgrown with branches, their long boughs trailing almost to the ground. His left, by which the enemy was compelled to advance, were placed under cover of some of the out-buildings.

Thus prepared, he waited the approach of the British, though not without sundry misgivings. It must be confessed that, at this juncture, he had not the most perfect confidence in the force under his command. They consisted, in great proportion, of those who, in that day, were known as new-made Whigs --men who had deserted the enemy and been cleansed of their previous treasons by the proclamation of Governor Rutledge, which, not long before, had promised immunity to all who came in promptly with their adhesion and joined the American ranks. There were also present some of those who, under Gainey, had recently received the protection of Marion, on the truce ground of Pedee. Major Gainey himself was among them, and with forty of his people, was placed conspicuously in the column in preparation for the British approach. Well might Marion feel some uneasiness at his situation, particularly in the absence of the cavalry on which he could rely. But our partisan had the art of securing the fidelity of those around him, in quite as great a degree as he possessed that other great military art, of extracting good service out of the most doubtful materials. He concealed his apprehensions, while he endeavored to dissipate those of his men.

Meanwhile, Witherspoon, with the reconnoitring party, advanced but a little distance in the woods, when they were met by the enemy's cavalry and instantly charged. A long chase followed, which soon brought the pursuers into view of the partisan. His men were half concealed behind the thick boughs of the cedars beneath which they were drawn up.