...er, to move forward, driving in the enemy's advance guards, but not to bring on an engagement unless he should hear firing. At night another despatch was received from General Rosecrans, dated from Barnett 's, about eight miles from Iuka, written at 12:40 P. M., stating that the head of the column had arrived there at 12 M. Owing to the density of the forests, and the difficulties of passing the small s...