A medieval narrative account, dated to the era of Edward I (c.1272), describing a legendary dispute between the Irish and Scottish kings over sovereignty of the Isle of Man. The story recounts how a wise man proposed that the island's freedom from venomous reptiles should determine its rightful overlord, resulting in the island being adjudged to Scotland. The text includes allegorical Christian interpretation relating the dispute to the contest between Christ and the devil for the human soul.