Elizabeth....I would check the colleges and see which one has an architech program. ...Here in maryland there is asuch a program at the University of maryland and they have a large library just for the Dept. So I would check to find out which college has such a program in SC...Maybe some SC listers might be able to point you in the right direction....If there is such a library...I bet you coould find a weath of information... Have you checked the Historical Society web site manuscript collection? You can also try out the various links on the web site that will lead you to a tour (architectual) of Charleston which names the builders...original owners and present owners...I found Lewis Duturaque's home on that web site , and an number of others with surnames you will be interested in. I cruised that site and printed out some of the pictures ...etc....