Regarding 18th and 19th century use of prehistoric shell middens, try:
Ceci, Lynn (1984) "Shell midden deposits as coastal resources" In
World Archaeology 16,1:62-74.
Daria
Daria E. Merwin
Institute for Long Island Archaeology
State University of New York at Stony Brook
Stony Brook, New York 11794-4364
phone: (516) 632-7618
fax: (516) 632-9165