It was "Northampton", which became the centerpiece for the Ridgely family setting. The tract of land was originally granted to Col. Henry Darnall, Sr. (1645–1711), who immigrated to Maryland from Hertfordshire, England. The 1500 acre (6 km2) parcel was surveyed for Colonel Darnall in 1695. Colonel Darnall was Gov. Charles Calvert, and 3rd Lord Baltimore's (1637–1714) primary agent in Maryland for many years. The property was inherited by his daughter, Ann Hill (1680–1749) in 1745, in consideration of £600 pounds of sterling. In the early 1760s, Col. Ridgely established several large ironworks, which thrived from the easily mined deposits of iron ore in the area. The large mansion "Hampton Mansion" was built on the tract of land containing 10,000 acres (40 km2), called "Northampton", after the end of the American Revolutionary War between 1783 and 1790 by Col. Ridgely's youngest son Captain Charles Ridgely III, known as "Charles The Mariner" (1733–1790), who died after its completion. "Hampton" is about due north of the city of Baltimore and about north of Towson (formerly Towsontown), the county seat since 1853 of Baltimore County.