England–Wales border after Harold's death at the Battle of Hastings, Wales was again divided without a leader to resist the Normans. Immediately after the Norman conquest of England, King William installed one of his most trusted confidants, William FitzOsbern, as Earl of Hereford. By 1071 he had started the building of Chepstow Castle, the first castle in Britain built of stone, near the mouth of the Wye. It served as a base from which the Normans continued to expand westward into south Wales, establishing a castle at Caerleon and extinguishing the Welsh kingdom of Gwent. William also installed Roger de Montgomerie at
Wye River (Maryland) the Wye River Memorandum. The watershed also includes the Wye Research and Education Center, operated by the University of Maryland College of Agriculture and Natural Resources, Maryland Agricultural Experiment Station (MAES). They conduct agricultural research and education, in cooperation with the nearby Aspen Institute Wye River Conference Centers. Elián González and his father stayed at the Wye River Plantation briefly in 2000. Water quality is threatened by development. Wye River (Maryland) The Wye River is a tributary of the Chesapeake Bay, on the Eastern Shore of Maryland. It was named by the Lloyd family, Edward Lloyd (delegate), and Edward Lloyd