exist as a functional unit and its few remaining members merged with other local Piscataway tribes. European settlement first occurred in the area in 1662 at Blue Plains (now the site of the city's sewage treatment plant just to the west of the modern neighborhood of Bellevue), and at St. Elizabeth (now the site of St. Elizabeths Hospital psychiatric hospital) and Giesborough (now called Barry Farm) in 1663. In 1663, Lord Baltimore granted ownership of the majority of the area on the south bank of the Anacostia River to George Thompson. Slightly inland, Lord Baltimore granted another large tract (known as Chichester) to John Meeks in 1664. "Anacostia Fort" was built on the heights at the present-day neighborhood of Skyland some time in the 18th century. The area became part of the District of Columbia in 1791. Congress passed the Residence Act of 1790 to establish a federally-owned district in which would be built the new national capital, and George Washington picked the current site in 1791 (a choice ratified by Congress later that year). In 1795, real estate speculator James Greenleaf purchased most of what is now the Anacostia Historic District from federal government. Although Greenleaf was bankrupted in the Panic of 1796–1797, a few homes dotted the shores of the eastern bank of Anacostia River in what is now the historic district. William Marbury, a wealthy Georgetown merchant who later was a party in the landmark Marbury v. Madison Supreme Court case, purchased much of the land that is now the Anacostia Historic District some time in the late 18th century or early 19th century. The first permanent modern settlement of size in the Anacostia Historic District came in 1820. The growth of the Washington Navy Yard created the need to provide housing for the many new employees working at the facility, but little land was available for new construction in the area and housing prices were high. Consequently, in 1818, the privately owned "Upper Navy Yard Bridge" was built over the Anacostia River at 11th Street SE. A toll bridge, this bridge was designed to permit easy access to Anacostia so that housing could be constructed on the eastern shore of the Anacostia River. Prior to the construction of this bridge and others upstream, there were no mudflats along the banks of the Anacostia. The bridges shifted currents and slowed the flow of the river, and within