FORE:They began at once seriously imitating the walk and manners of their heroes. The tall, lank boys modeled themselves on Shorty, and the short, chubby ones on Si. And there at once rose contention between them as to which was the greater hero.The train finally halted on a side-track in the outskirts of Chattanooga, under the gigantic shadow of Lookout Mountain, and in the midst of an ocean of turmoiling activity that made the eyes ache to look upon it, and awed every one, even Si and Shorty, with a sense of incomprehensible immensity. As far as they could see, in every direction, were camps, forts, intrenchments, flags, hordes of men, trains of wagons, herds of cattle, innumerable horses, countless mules, mountains of boxes, barrels and bales. Immediately around them was a wilderness of trains, with noisy locomotives and shouting men. Regiments returning from veteran furlough, or entirely new ones, were disembarking with loud cheering, which was answered from the camps on the hillsides. On the river front steamboats were whistling and clanging their bells.