In reference to the charts Elizabeth spoke of....I found it very useful   to 
chart out the Vol. of will books...listed Surnames, volumes and page numbers. 
To do this you really need to use the Index to the Charleston wills....it 
helped a lot and saved a lot of time once we got to the Charleston County 
Library. I would suggested checking your libraries to see if they have a copy 
of the index before hand.  I bought a copy. It also helps if you can take a 
relative or friend to do the Xeroxing while  you continue with the 
researching. The Xeroxing is time consuming and if a line for the machine  
occurs would take up some of your precious time.