...e have but little news from Gen. Lee's army. On Friday the enemy crossed the Potomac at Williamsport, some ten or fifteen thousand strong, over to Martinsburg. On learning of the enemy's advance, Stonewall Jackson attacked him and drove him back across the river on a "double-quick." The Yankees are represented as not having waited for the second fire from our men. The movement, no doubt, was intended as a rut...