...of the 20th the Federal signal officer on Sugar Loaf mountain, in Maryland, reported, The enemy have moved away from Leesburg. This Banks wired to McClellan, whereupon the latter wired to Stone, at Poolesville , that a heavy reconnaissance would be sent out that day, in all directions, from Dranesville, concluding: You will keep a good lookout upon Leesburg, to see if this movement has the effect to drive t...