In 1682 the Duke of York granted land to William Penn who called it the "Three Lower Counties" of Pennsylvania. These were New Castle, Sussex, and Kent. In 1704 Delaware convened its own assembly with "effective" self-rule, but the PA governor still controlled. Before 1775, parts of Delaware were in Maryland, so many records reside in Maryland. In 1764 and 1775 Delaware boundries were set. Documents before 1682, when Delaware was governed from a distance, might be found in many places, including the archives of New York, Sweden, The Netherlands, and Great Britain. For 1682-1775 records might be in Delaware, Maryland and Pennsylvania. This information is from the Delaware Genealogical Research Guide published by the Delaware Genealogical Society.