There was sharp fighting all along and all day, for the forest was so dense that the hostile lines came almost into contact before fighting was possible. One instance was particularly horrible. After some hours of close engagement my brigade, with foul pieces and exhausted cartridge boxes, was relieved and withdrawn to the road to protect several batteries of artillery--probably two dozen pieces--which commanded an open field in the rear of our line. Before our weary and virtually disarmed men had actually reached the guns the line in front gave way, fell back behind the guns and went on, the Lord knows whither. A moment later the field was gray with Confederates in pursuit. Then the guns opened fire with grape and canister and for perhaps five minutes--it seemed an hour--nothing could be heard but the infernal din of their discharge and nothing seen through the smoke but a great ascension of dust from the smitten soil. When all was over, and the dust cloud had lifted, the spectacle was too dreadful to describe. The Confederates were still there--all of them, it seemed--some almost under the muzzles of the guns. But not a man of all these brave fellows was on his feet, and so thickly were all covered with dust that they looked as if they had been reclothed in yellow. "We bury our dead," said a gunner, grimly, though doubtless all were afterward dug out, for some were partly alive. To a "day of danger" succeeded a "night of waking." The enemy, everywhere held back from the road, continued to stretch his line northward in the hope to overlap us and put himself between us and Chattanooga. We neither saw nor heard his movement, but any man with half a head would have known that he was making it, and we met it by a parallel movement to our left. By morning we had edged along a good way and thrown up rude intrenchments at a little distance from the road, on the threatened side. The day was not very far advanced when we were attacked furiously all along the line, beginning at the left. When repulsed, the enemy came again and again--his persistence was dispiriting. He seemed to be using against us the law of probabilities: of so many efforts one would eventually succeed.