The guns in battery along the line opened fire, and the enemy's works on the long range of hills, replied to the vigorous salute. The line of Thomas's army moved forward, and the grand spectacle commenced. It was a magnificent sight, and we who beheld it can never forget the gleam of those twenty thousand bayonets, as the column pressed steadily on. The enemy believed it was only a holiday pageant, and their pickets leaned on their muskets, and watched the brilliant movement. A few shots from the skirmishers scattered these spectators, and the battle commenced. The army of the Cumberland was intent upon wiping out the stain of Chickamauga, and charged impetuously upon the line of rifle-pits before them, capturing them, and carrying Orchard Knoll, a hill of considerable importance for future operations. The enemy had been driven back a mile, and the nationals halted, and fortified the ground they had captured. On the right was Hooker, occupying Lookout Valley, above which frowned the heights of Lookout Mountain, bristling with rebel cannon. On the creek, in the middle of the valley, extended the line of Confederate pickets; but there was no approach to the mountain on this side. Hooker sent a column round its base to a road which conducted, by a zigzag route, to the summit. The enemy's pickets were captured, and Lookout Creek bridged. Hooker's troops fought with the utmost bravery, and demonstrated that Eastern soldiers, when well led, were fully the equals of those of the West. They swept everything before them in the fierce struggle that followed. The Union batteries opened, and the rebels replied from the steeps of the mountain, drawing down, as it seemed, the thunder and the lightning from the clouds above, till the hills trembled in the commotion. The column under General Geary, passing through a piece of woods, reached the road which led to the heights above. It was a steep path, and every accessible place was occupied by troops and guns for its defence. But the column dashed up the precipitous slopes, beating down all opposition, capturing guns and men on their way. Onward and upward, in the literal sense of the words, they swept, penetrating the clouds, which soon hid them from the view of those below. Hooker's battle in the clouds was a complete success, and Lookout Mountain was captured. Two thousand prisoners were taken, and the victors in this remarkable contest rested from their labors on the summit. They had "gone up," in the highest sense of the phrase, and the rebels also, in another sense.