Constitutional status of Cornwall of Exeter, styled himself as "King of the English, and ruler of this province of Britons". Edmund's successor Edgar styled himself "King of the English and ruler of the adjacent nations". This was followed by king Aethelred II (978–1016) describing Cornwall not as an English shire, but as a province, or client territory. Surviving charters issued by the Kings of England Edmund I (939–946), Edgar (959–975), Edward the Martyr (975–978), Aethelred II (978–1016), Edmund II (1016), Cnut (1016–1035) and Edward the Confessor (1042–1066) record grants of land in Cornwall made by these kings. In contrast to the easterly concentration of
Alfonso Enríquez, Count of Gijón and Noreña of the stipulations of the treaty was the marriage of Alfonso Enríquez with Isabel of Portugal, a natural daughter of King Ferdinand I, who at that time was about nine years old. Alfonso's father, King Henry II, died in May 1379 and was succeeded by his first-born son who reigned as John I of Castile. In the spring of 1381, King John I was preparing to go to war with Portugal. His half-brother, Alfonso Enríquez, knowing that all the soldiers from Asturias were away from the region, offered England, an ally of Portugal, the harbor of Gijón. Upon hearing this,