...out half past 4 A. M. our signal guns were fired, upon hearing which, all were aroused and the command placed under arms. Little before the dawn of day musketry was heard in the direction of and in Fredericksburg , and, after that, the fire of the enemy's batteries began. Repairing to the front of my line of pickets before it was clear day, I learned that there was none of the enemy's infantry anywhere visib...