...arsons's were put in near the clump of trees. Brown's and Arnold's batteries had been so crippled that they were now withdrawn, and Brown's was replaced by Cowan's. Meantime the enemy advanced, and McGilvery opened a destructive oblique fire, reenforced by that of Rittenhouse's six rifle-guns from Round Top, which were served with remarkable accuracy, enfilading Pickett's lines. The Confederate approac...