Hi Folks, 
I have received this information from an amateur reseacher:

JOY

Joy, the NPS handbook on Ft Moultrie is accurate to the best of my knowledge. 
Sullivan's Island and Ft Sullivan were named for Capt Florence O'Sullivan who 
came on the first ship (1670) into Charles Towne. He was very close to one of 
the 7 Lords Proprietor -- can check on which one if you are interested. An 
interesting aside -- O'Sullivan brought with him an indentured servant named 
William BEVINS. Within 3 years,Wm was free of his indenture and had his own 
landgrant. I have been looking for a connection to our NC line. It would be 
really cool to have an ancestor on the FIRST BOAT.

And now the rest of the story... O'Sullivan stayed on Sullivan's island and 
had a large cannon which he was to fire as an alarm if enemy ships were 
sailing in. O'Sullivan and his family were isolated on the island because 
Florence (bad guy that he was) liked little boys and no one wanted him around 
the main settlement.

On Carolina Day, June 12,1776, the small battery of men on Ft Sullivan 
defeated the British Fleet. This victory is said to have been a great 
encouragement toward getting signatures on the Declaration of Independence, 
as it showed that we rebels had a chance against the Brits. The name of the 
fort was changed to Ft Moultrie after that decisive battle. Can get you the 
date if you want it.

Moultrie was a surveyor in Civilian life. He surveyed the final state line 
between NC and SC.

Hope this helps. Let me know if you have more questions.