sentences:  The Chronicle of the Kings of Alba records that shortly thereafter, in '948 or 949, Malcolm (I) of Scotland and Cumbria, at Constantine's instigation, raided Northumbria as far south as the River Tees and returned with many cattle and captives.Marios Costambeys suggests that it "may have been directed against, or mounted in favour of, Eirik, though the protagonist could just as easily have been Óláf Sihtricson.