Reference Sources:
The Anglo-Saxon Chronicles.
Nennius; The British Chronicles
Chronicle of St Gildas
Historia Regum Britanniae Geoffery of Monmouth
The Annals of Cambriae
The Anglo-Saxon Chronicles. By G. N. Garmonsway (editor) Everymans Classic Library.
The Historical Works of Simeon of Durham;
Translated by The Rev Joseph Stevenson M A http://www.Google.books.com
Alfred the Great: Asser’s Life of King Alfred & Other Contemporary Sources
Translator; Simon Keynes (Penguin Classics)
Legends of the Celts, F, Delaney, (Grafton)
The Annals Cambriae (Everyman Press)