...ed illusions on the part of the Federals. McClellan had come into possession at Frederick of a copy of Lee's order directing Jackson to attack Harpers Ferry, and Longstreet and myself to proceed to Boonsboro . The copy found was the one directed to me, though I must disclaim here, as ever before, that I was the loser of it. According to this order, Longstreet was at Boonsboro, and not Hagerstown, on the...