...r 15th the enemy was in motion. The indications were that Fredericksburg was again to be occupied. Sumner's corps had marched in the direction of Falmouth, and gunboats and transports had entered Aquia Creek . McLaws's and Ransom's divisions were ordered to proceed to that city; on the 21st it became apparent that the whole army—under General Burnside, who had succeeded General McClellan—w...