The Anglo-Saxon Chronicle entry for the year 491 states:
Her Ælle 7 Cissa ymbsæton Andredescester 7 ofslogon alle þa þe þærinne eardedon; ne wearþ þær forþon an Bret to lafe.
This year Ælla and Cyssa besieged Anderida, and slew all that were therein; nor was one Briton left there afterwards.
Anderida is the Roman fort at Pevernsey, near Eastbourne, Sussex.
