THREE:At that moment a rebel cannon roared on Lookout Mountain, just over them, and the wicked screech of a shell cleft the air. Both of the team sters dropped on the ground in a paralysis of fear.Marvelous changes had been wrought by 18 months' tuition in the iron school of war, in the 10 separate herds of undisciplined farmer boys which originally constituted the regiment. Yellow, downy beards appeared on faces which had been of boyish smoothness when the river was crossed, but this was only one of the minor changes. There was an alertness, a sureness, a self-confidence shining from eyes which was even more marked. Every one carried himself as if he knew precisely what he was there for, and intended doing it. There was enough merriment around camp, but it was very different from the noisy rollicking of the earlier days. The men who had something to do were doing it with systematic earnestness; the men who had nothing to do were getting as much solid comfort and fun as the situation afforded. The frothy element among officers and men had been rigorously weeded out or repressed. All that remained were soldiers in the truest sense of the word. The change had been very great even since the regiment had lined up for the fearful ordeal of Chickamauga.

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