"Believing that the people of Maryland possessed a spirit too lofty to submit to such a government, the people of the South have long wished to aid you in throwing off this foreign yoke, to enable you again to enjoy the inalienable rights of freemen," read the address. But the people were not conscious of living under a foreign yoke, neither that they were a conquered province, and therefore did not respond to the call to rise in rebellion against the old flag. It was time for Lee to proceed to the execution of his plans. The Army of the Potomac was approaching Frederick. Lee directed Jackson to move on the 10th of September directly west, cross South Mountain at Boonsboro' Gap, move through the town of Sharpsburg, cross the Potomac, and fall upon Martinsburg, where Colonel White, with a brigade of Union troops, was guarding a large amount of stores. General McLaw's and Anderson's divisions were to occupy Maryland Heights--the termination of the South Mountain range in Maryland--while General Walker was sent across the river into Virginia to occupy Loudon Heights. Thus approaching from the north, east, south, and west, Colonel Miles would have no chance to escape. Longstreet was to move to Hagerstown to be ready for a sudden spring into Pennsylvania. Howell Cobb was to hold Crampton's Pass, and D. H. Hill the Boonsboro' Gap. "The commands of General Jackson, McLaw, and Walker, after having accomplished the objects for which they have been detached, will join the main body of the army at Boonsboro' or Hagerstown," read the order. On the 11th, the last regiment of Rebels departed from Frederick, and soon after the advance of the Army of the Potomac entered the place. The inhabitants shouted, waved their flags once more, and hailed McClellan as their deliverer. BATTLE OF SOUTH MOUNTAIN.