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Irish genealogy website directory.
www.biz-ire.com/Ireland/history/slaves.htm
Description:
Slavery in one form or another has existed in Ireland since the earliest times. Early Celtic society had five classes of people from King to slave. Nial of the Nine Hostages an early King of Ireland (379-405) regularly went on slave raiding trips during and after the Roman withdrawal from England, on one of these raids he is believed to have captured St Patrick from Wales or Cornwall.