New Castle County, Delaware On November 6, 1674, New Amstel was made dependent on New York Colony, and was renamed New Castle on November 11, 1674. On September 22, 1676, New Castle County was formally placed under the Duke of York's laws. It gained land from Upland County on November 12, 1678. On June 21, 1680, St. Jones County was carved from New Castle County. It is known today as Kent County, Delaware. On August 24, 1682, New Castle County, along with the rest of the surrounding land, was transferred from the Colony of New York to the possession of William Penn, who established
Chilham Castle Tradescant the elder, were redesigned twice in the eighteenth century. First, under the London banker James Colebrooke (who bought the estate from the Digges family) fine vistas were created stretching to the river and then, under Thomas Heron (who acquired the estate from Colebrooke's son Robert), Capability Brown made further recommendations for change, some of which were implemented. Chilham Castle was purchased by James Wildman in 1794 and in 1816 was inherited by his son James Beckford Wildman, who sold it in 1861, because of falling income after emancipation of the slaves on the family estates in the West Indies.