OR, Series 1, Vol. 2, Page 917

Headquarters Virginia Forces
Richmond, Va.
June 10, 1861
Col. Eppa Hunton
Commanding, Leesburg, Va.
   Your letter of the 8th instant has been received, and it is hoped that you have accomplished the destruction of the bridges upon the {Alexandria,} Loudoun and Hampshire Railroad, and otherwise rendered the road unserviceable to the enemy. Unless any of the rolling stock can be transferred to the Orange {& Alexandria} or Manassas {Gap} Railroad, it must be destroyed immediately. Should it not already be demolished, the gondola and flats must not be permitted to fall into the hands of the enemy.
   Lieut. Col. C. C. Cocke has been ordered to duty with your regiment. General G. T. Beauregard is in command of all the forces in Prince William, Fairfax, and Loudoun, through whom you should make your reports, and from whom you will receive instructions. Your letter of the 8th has been referred to him for his information and action. It is necessary to destroy the navigation of the Chesapeake and Ohio Canal, to prevent its being used by the enemy, and you will take measures to do so effectually, by cutting the dams at Seneca and Edwards Ferry, and blowing up the Monocacy Aqueduct.
Respectfully, your obedient servant,
R. E. Lee
General, Commanding