Since 1954 Robert A. Elder, Jr., assistant curator of ethnology at the
United States National Museum, has been investigating the site on the
Chesapeake Bay of a plantation or small settlement known as Angelica
Knoll. This investigation has revealed a generous variety of
gravel-tempered utensil forms, including both 17th and 18th century
styles. The range of associated artifacts points to a site dating from the
late 17th century to about 1765.