Complex sentence: The region on the York was divided into two plantations, one retaining the old name, Chiskiack, and the other styled "York," settled by Sir John Harvey at the mouth of Wormeley's Creek, about three miles below the present Yorktown.
Split into simpler sentences: The region on the York River was divided into two plantations, one retaining the old name, Chiskiack, and the other to be named York. The latter was settled by Sir John Harvey at the mouth of Wormeley's Creek, about three miles below the present Yorktown.