 During the 5th century, groups of settlers of mixed stock migrated into the Fens and up the major rivers inland.From Bede it is known that the people who settled in what became East Anglia were Angles, originally from what is now part of Denmark.By the 6th century, new settlements had also appeared along the river systems of the east coast of East Anglia, including the Deben, the Alde and the Orwell.