Nor'mandy, formerly a province of France, lying along the seaboard of the English Channel, between Brittany and French Flanders. In area it corresponded approximately to the modern deps. of Seine-Inferieure, Eure, Orne, Calvados, and Manche, its capital being Rouen. From the middle of the 9th century its coasts were harried by the vikings or sea-rovers of the north; by 912 they had established themselves in such force along the Seine that Charles, king of the Western Kingdom, was glad to make an agreement with their leader Rolf or Rollo, Duke of the Northmen, who became the king's vassal and a Christian. After the conquest of England by Duke William (1066), Normandy continued an appanage of the English crown until 1203-4, when the duchy was taken away from John by the king of France, on the plea that as the murderer of his nephew Arthur he (John) had forfeited his French fiefs. The claim to the title was, however, only formally renounced by Henry III. in 1259. Twice subsequently Normandy was in English hands: Edward III. conquered it in 1346, and Henry V. in 1417-18; but the English were finally driven out in 1450. The Channel Islands (q.v.) are a remnant of the Norman possessions still belonging to the descendants of the Norman kings of England. See works by Blackburn (1869) and K. Macquoid (1874).