...the offensive; but the enemy, informed doubtless by disloyal citizens of the arrival of these reinforcements, evacuated London on the night of the same day. On the twenty-eighth of October I sent Brigadier-General Vaughn , with a force of cavalry, across the Little Tennessee River at Morgantown, with orders to make a demonstration upon Knoxville and gain all the information he could of the enemy's force, movements, an...