Lots of good suggestions have been offered for the exposed limestone. A major
reference, however, has not been mentioned. John Ashurst and Francis G.
Dimes' book, Conservation of Building and Decorative Stone,
Butterworth-Heinemann, should be on the bookshelf of any archaeologist doing
work with architectural stone.
 
Best,
 
Michael Trinkley, Ph.D.
Director
Chicora Foundation, Inc.
PO Box 8664
Columbia, SC  29202-8664
803/787-6910
Email: [log in to unmask]