..., and Hood's division, which was encamped on the Rapidan, marched to the same place. They were followed on the fourth and fifth by Ewell's corps, leaving that of A. P. Hill to occupy our lines at Fredericksburgh . The march of these troops having been discovered by the enemy on the afternoon of the fifth, and the following day he crossed a force, amounting to about one army corps, to the south side of the...