... one spur was enough, because if one side of your horse went, the other would be sure to go. When we had charged about 750 yards, having about 500 more to get over before reaching the stone wall, Pettigrew 's Brigade broke all to pieces and left the field in great disorder. At this time we were mostly under a fierce artillery fire; the heaviest musketry fire came farther on. General Pettigrew was ...