I observed this phenomenon at Pickett's Mill. Standing at the right of the line I had an unobstructed view of the narrow, open space across which the two lines fought. It was dim with smoke, but not greatly obscured: the smoke rose and spread in sheets among the branches of the trees. Most of our men fought kneeling as they fired, many of them behind trees, stones and whatever cover they could get, but there were considerable groups that stood. Occasionally one of these groups, which had endured the storm of missiles for moments without perceptible reduction, would push forward, moved by a common despair, and wholly detach itself from the line. In a second every man of the group would be down. There had been no visible movement of the enemy, no audible change in the awful, even roar of the firing--yet all were down. Frequently the dim figure of an individual soldier would be seen to spring away from his comrades, advancing alone toward that fateful interspace, with leveled bayonet. He got no farther than the farthest of his predecessors. Of the "hundreds of corpses within twenty paces of the Confederate line," I venture to say that a third were within fifteen paces, and not one within ten. It is the perception--perhaps unconscious--of this inexplicable phenomenon that causes the still unharmed, still vigorous and still courageous soldier to retire without having come into actual contact with his foe. He sees, or feels, that he _cannot_. His bayonet is a useless weapon for slaughter; its purpose is a moral one. Its mandate exhausted, he sheathes it and trusts to the bullet. That failing, he retreats. He has done all that he could do with such appliances as he has.