...Harrisburg comes within your means, capture it. So on the morning of June 22d it had not been settled that Longstreet and Hill should follow Ewell. Later in the day (3:30 P. M.) he again writes Ewell : I also directed General Stuart, should the enemy have so far retired from his front as to permit of the departure of a portion of the cavalry, to march with three brigades across the Potomac, and pl...