case, after crossing the river, you must move on and feel the right of Ewell s troops, collecting information, provisions, etc."
Clearly, when General Lee told Stuart that if he crossed at Shepherdstown he must move on over to Frederickstown, he did not mean for Stuart to stop there, but merely to indicate the best route to join Ewell, as he had written Stuart that one of Ewell's columns would move to the Susquehanna by Emmittsburg. In this second letter he said: "The movements of Ewell's corps are as stated in my former letter" (22d). On that day he had written Ewell from Berryville: * * * "Mine of to-day authorizing you to move towards the Susquehanna, I hope has reached you. * * * 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 place himself on your right and communicate with you, keep you advised of the movements of the enemy and assist in collecting supplies for the army." There is not a word in the instructions to Stuart, although the report says so, about his being left to guard the passes of the mountain or harass and impede the enemy, "should he attempt to cross the Potomac"; for the plain reason that he was expected to cross in advance of the enemy and move on into Pennsylvania with Ewell.
Stuart's Alternatives.
Nobody can reconcile the statements about the cavalry in General Lee's two reports with his orders to both Ewell and Stuart on June 22d, and his letter of 5 P. M., June 23d, to Stuart, which is, as I have said, in Colonel Taylor's handwriting. No discretion was given to Stuart to remain with the army in Virginia or join Ewell in Pennsylvania; but discretion was given him to go by Shepherdstown, or cross in Hooker's rear at Seneca. No matter which route he went he would be equally out of sight of the enemy and out of communication with General Lee. Stuart would have been where General Lee put him. In his last letter to Stuart General Lee speaks of the movements of troops in the Valley the next day.
If General Lee had anticipated that it would break up Stuart's
