Anglo-Saxon Chronicle. 851. This year Alderman Ceorl, with the men of Devonshire, fought the heathen army at Wemburg [Map], and after making great slaughter obtained the victory. The same year King Athelstan and Alderman Elchere fought in their ships, and slew a large army at Sandwich [Map] in Kent, taking nine ships and dispersing the rest. The heathens now for the first time remained over winter in the Isle of Thanet [Map]. The same year came three hundred and fifty ships into the mouth of the Thames; the crew of which went upon land, and stormed Canterbury, Kent [Map] and London; putting to flight Bertulf, king of the Mercians, with his army; and then marched southward over the Thames into Surrey. Here [his father] Ethelwulf and his son [his brother] Ethelbald, at the head of the West-Saxon army, fought with them at Ockley [Map], and made the greatest slaughter of the heathen army that we have ever heard reported to this present day. There also they obtained the victory.