...igade formed on McPherson's Ridge, from the Fairfield road to the railroad cut; one section of Calef's battery A, 2d United States, near the left of his line, the other two across the Chambersburg or Cashtown pike. Devin formed his disposable squadrons from Gamble's right toward Oak Hill, from which he had afterward to transfer them to the north. of the town to meet Ewell. As Heth advanced, he threw...