...r Harper's Ferry, in route as believed for Charlestown. Their object on the line of march was plunder, and we have heard of various depredations committed, as far as they proceeded unmolested. At Halltown , however, they were brought to a stand-point by one of the sentinels of Capt. Henderson, who hailed and fired at them, which was quickly followed by the report of two other sentinels, when the whole ...