... telegraphic communications, which from that point had to pass west by way of Bedford, no information could be sent to General Couch, who was then at Chambersburg. The head of this column reached Chambersburg at three o'clock A. M., on Saturday, the thirtieth ult. The rebel brigades of Vaughn and Jackson, numbering about three thousand men, crossed the Potomac about the same time, at or near Williamsp...