 According to the Sleat shenachie, Ùisdean, along with several young gentlemen from the Western Isles went on a raiding expedition to Orkney.The tradition runs that the Western Islesmen were victorious in their conflict with the Northern Islesmen, and that the Earl of Orkney was also slain.Ùisdean is then said to have ravaged Orkney, and carried off much loot.