The Colonels saluted and started off at a gallop. In a few minutes twenty-five hundred men were in simultaneous movement. Five companies of cavalry wheeled into column of companies, and advanced at a trot through the fields, seeking to gain the shelter of the forest. The six infantry regiments slid up alongside of each other, and pushed on in six parallel columns of march, two on the right of the road and four on the left. The artillery, which alone left the highway, followed at a distance of two or three hundred yards. The remaining cavalry made a wide detour to the right, as if to flank the enemy's left. It was a mile and a quarter--it was a march of fully twenty minutes--to the edge of the woodland, the proposed cover of the column. Ten minutes before this point was reached a tiny puff of smoke showed on the brow of the hostile ridge; then, at an interval of several seconds, followed the sound of a distant explosion; then, almost immediately, came the screech of a rifled shell. Every man who heard it swiftly asked himself, "Will it strike _me_?" But even as the words were thought out it had passed, high in air, clean to the rear, and burst harmlessly. A few faces turned upward and a few eyes glanced backward, as if to see the invisible enemy. But there was no pause in the column; it flowed onward quietly, eagerly, and with business-like precision; it gave forth no sound but the trampling of feet and the muttering of the officers, "Steady, men! Forward, men." The Confederates, however, had got their range. A half minute later four puffs of smoke dotted the ridge, and a flight of hoarse humming shrieks tore the air. A little aureole cracked and splintered over the First, followed by loud cries of anguish and a brief, slight confusion. The voice of an officer rose sharply out of the flurry, "Close up, Company A! Forward, men!" The battalion column resumed its even formation in an instant, and tramped unitedly onward, leaving behind it two quivering corpses and a wounded man who tottered rearward.