...d the second letter from General Lee, dated June 23rd, giving him permision to cross the Potomac east of the Blue Ridge, provided he could do so without hindrance, no doubt influenced him to cross at Seneca instead of Shepherdstown, for Hooker's army had then made no, movement northward; and he believed that by crossing at Seneca he would lose no time in getting into the position assigned him on Ewell's...