 Maredudd ab Owain (d. 999) paid a large ransom for 2,000 Welsh slaves, which demonstrates the large-scale slave raiding upon the British Isles.Vikings traded with the Gaelic, Pictish, Brythonic and Saxon kingdoms in between raiding them for slaves.Some of the earliest accounts of the Anglo-Saxon English comes from the account of the fair-haired boys from York seen in Rome by Pope Gregory the Great.