...ear Sharpsburgh, on the seventeenth instant. The enemy, routed at passes of South-Mountain on the fourteenth, were rapidly pursued and brought to a stand near Sharpsburgh, on the westerly side of Antietam Creek , on the sixteenth instant. Massed in rear of our forces, drawn up in line of battle under General McClellan, this corps remaining inactive during the day, was moved on the night of the sixteenth ...