Lynn,
Mouth harps were excavated from Lower Shawneetown, a historic contact Native American village on the Ohio River in Kentucky. The ethnographic information available for the site dates the contact with Europeans to a period from 1751 to 1758 on the Kentucky side and 1730 to 1758 directly opposite on the Ohio side. David Pollack and Gwynn Henderson presented a paper on the site at the 58th annual meeting of the Central States Anthropological Society in Lexington. I have a copy of this paper and would be happy to send it snail mail if you want it.
Nancy O'Malley
Department of Anthropology
211 Lafferty Hall
University of Kentucky
Lexington, Ky. 40506
606-257-8208