The victory obtained on the 16th of August having suggested views of more extensive conquest in the south, Sir Henry Clinton had determined to send a large reinforcement to the southern army. In the opinion that Lord Cornwallis could meet with no effectual resistance in the Carolinas, he had ordered the officer commanding this reinforcement to enter the Chesapeake in the first instance, and to take possession of the lower parts of Virginia, after which he was to obey the orders he should receive from Lord Cornwallis, to whom a copy of his instructions had been forwarded. The detachment amounted to near three thousand men, under the command of General Leslie. It sailed on the 6th of October, and, entering James River after a short passage, took possession of the country on the south side as high as Suffolk. After a short time, Leslie drew in his out-posts, and began to fortify Portsmouth. At this place he received orders from Lord Cornwallis to repair to Charleston by water. While Cornwallis waited at Wynnsborough for this reinforcement, the light corps of his army were employed in suppressing the parties which were rising in various quarters of the country, in opposition to his authority. Marion had become so formidable as to endanger the communication between Camden and Charleston. Tarlton was detached against him, and Marion was under the necessity of concealing himself in the swamps. From the unavailing pursuit of him through marshes which were scarcely penetrable, Tarlton was called to a different quarter, where an enemy supposed to be entirely vanquished, had reappeared in considerable force. [Sidenote: Major Wemyss attacks and is defeated by Sumpter.] Sumpter had again assembled a respectable body of mounted militia, at the head of which he advanced towards the posts occupied by the British. On receiving intelligence of his approach, Earl Cornwallis formed a plan for surprising him in his camp on Broad River, the execution of which was committed to Major Wemyss. That officer marched from Wynnsborough at the head of a regiment of infantry and about forty dragoons, reached the camp of Sumpter several hours before day, and immediately charged the out piquet, which made but a slight resistance. Only five shots are said to have been fired, but from these Wemyss received two dangerous wounds which disabled him from the performance of his duty. The assailants fell into confusion, and were repulsed with the loss of their commanding officer and about twenty men. After this action, Sumpter crossed Broad River, and, having formed a junction with Clarke and Branan, threatened Ninety Six.