 By the Treaty of Birgham, 1290, Margaret was placed under Edward's guardianship and betrothed to his eldest son, the Prince of Wales.Margaret set out from Norway for Scotland in the autumn of that year, but was taken ill on the voyage and died at Orkney on 26 September 1290, age seven.Scotland was left without an heir and with two claimants, so the Guardians of Scotland again appealed to Edward I to act as an arbitrator between the Competitors for the Crown of Scotland.