Having failed in his hope of bringing on a general engagement, he evacuated Camden, and marched down the river on its north side to Neilson's ferry. Among the objects to be obtained by this movement was the security of the garrison at Motte's house. But the siege of that place had been so vigorously prosecuted that, on crossing the river, his lordship received the unwelcome intelligence that it had surrendered on the twelfth, and that its garrison, consisting of one hundred and sixty-five men, had become prisoners. On the preceding day, the post at Orangeburg had surrendered to Sumpter. On the evening of the fourteenth, Lord Rawdon moved from Neilson's ferry, and marched to Monk's Corner, a position which enabled him to cover those districts from which Charleston drew its supplies. {May.} While the British army was thus under the necessity of retiring, the American force was exerted with a degree of activity which could not be surpassed. After the post at Motte's house had fallen, Marion proceeded against Georgetown, on the Black river, which place he reduced; and Lee marched against fort Granby, a post on the south of the Congaree, which was garrisoned by three hundred and fifty-two men, principally militia. The place was invested on the evening of the fourteenth, and the garrison capitulated the next morning. The late movement of the British army had left the garrison of Ninety Six and of Augusta exposed to the whole force of Greene, and he determined to direct his operations against them. Lee was ordered to proceed against the latter, while the general should march in person to the former. The post at Ninety Six was fortified. The principal work, which, from its form, was called the Star, and which was on the right of the village, consisted of sixteen salient and reentering angles, and was surrounded by a dry ditch, fraize, and abattis. On the left was a valley, through which ran a rivulet that supplied the place with water. This valley was commanded on one side by the town prison, which had been converted into a block-house, and on the other by a stockade fort, in which a block-house had been erected. The garrison, commanded by Lieutenant Colonel Cruger, was ample for the extent of the place, but was furnished with only three pieces of artillery. On evacuating Camden, Lord Rawdon had given directions that the garrison of Ninety Six should retire to Augusta; but his messengers were intercepted; and Cruger, remaining without orders, determined to put his post in the best possible state of defence. [Sidenote: Greene invests Ninety Six.]