...he latter engaged a part of Gen. Buell's army at Perryville, about ten o'clock on the eighth of October. A general battle ensued, and was continued till dark; it was mainly fought by Major. Geon. McCook 's corps ; the enemy retreated during the night; the losses were heavy on both sides, but no official reports of the numbers engaged or the losses on either side have been received. After this battl...