...on, was driven back. The enemy's skirmishers advanced through the gap, and General Long found it impracticable to post his artillery. Perry's brigade checked the further advance of the enemy, and Mahone 's was put in motion to regain the ground from which our men had been driven, but before it reached the place, it was reoccupied by another brigade of Heth's division. Perry's and Posey's brigade th...