Referring to Algerian pirates using Irish ports they did so at the behest of the English rulers in the Irish province of Munster Sir William Herbert along with his subordinates used the pirates to carry on illict trading, the wine and other goods were pirated from English and French ships.
Sir Edward Denny used his castle near Tralee to exercise the illict trading, Denny also had seats in Cornwall and south Wales, he did for the pirates in Munster what he had done previuosly in his Welsh and Cornish estates, Denny was later on created Earl of Norwich.