St. Clair had his wish. The enemy seemed to have enough for the time. The hot, breathless day passed without any further advance. Now and then they heard the Northern bugles, and the scouts reported that the foe was still gathering heavily not far away, but the Invincibles, from their camp, saw nothing. "I suppose the colonel was right," said Happy Tom, "and this must have been a sort of prologue. But if the prologue was so hot what's the play going to be?" "Something hotter," said Harry. "A vague but true answer," said Langdon. Yet the delay was long. They lay all that day and all that night along the banks of Bull Run, and a hundred conflicting reports ran up and down their ranks. The Northern army would retreat, it would attack within a few hours; the Southern army would retreat, it would hold its present position; both sides would receive reinforcements, neither would receive any fresh troops. Every statement was immediately denied. "I refuse to believe anything until it happens," said Harry, when night came. "I'm getting hardened to this sort of thing, and as soon as my time off duty comes I'm going to sleep." Sleep he did in the shot-torn woods, and it was the heavy sleep of exhaustion. Nerves did not trouble him, as he slept without dreams and rose to another windless, burning day. The hours dragged on again, but in the night there was a tremendous shouting. Johnston, with eight thousand men, had slipped away from Patterson in the mountains, and the infantry had come by train directly to the plateau of Manassas, where they were now leaving the cars and taking their place in the line of battle. The artillery and cavalry were coming on behind over the dirt road. The Southern generals were already showing the energy and decision for which they were so remarkable in the first years of the war. Johnston was the senior, but since Beauregard had made the battlefield, he left him in command. The Invincibles were moved off to the left along Bull Run, and were posted in front of a stone bridge, where other troops gathered, until twelve or thirteen thousand men were there. But Harry and his comrades were nearest to the bridge, and it seemed to him that the situation was almost exactly as it had been three nights before. Again they faced Bull Run and again they expected an attack in the morning. There was no change save the difference between a ford and a bridge. But the Invincibles, hardened by the three days of skirmishing and waiting, took things more easily now. They lay in the woods near the steep banks, and the batteries commanded the entrance to the bridge. The night was once more hot and windless and they were so quiet that they could hear the murmur of the waters. Far across Bull Run they saw dim lights moving, and they knew that they were those of the Northern army.