these defences, if there were no obstructions in the channel, would be much easier with a small squadron than to stop and give the forts battle with ironclads.
This fact was established during the civil war, and the subject has been ably treated in a work published in 1868 by Lieutenant-Colonel Von Sheliha.
Before proceeding to attack the defences of Charleston, Rear-Admiral Dupont issued the following order:
The bar will be buoyed by the Keokuk, Commander Rhind, assisted by C. O. Boutelle, Assistant United States Coast Survey, commanding the Bibb, by Acting-Ensign Platt, and by the pilots of the fleet.
The commanding officers will, previous to crossing, make themselves acquainted with the value of the buoys.
The vessels, on signal being made, will form in the prescribed order ahead at intervals of one cable's length.
The squadron will pass up the Main Ship Channel without returning the fire of the batteries on Morris Island, unless signal should be made to commen