Lord Boyd obtained the cession of the Orkney Islands to Scotland, 8 September 1468, from Christian I, King of Norway, for whose daughter Margaret, he negotiated a marriage with James III. While absent for that purpose he and his son Thomas (the Earl of Arran) and his brother (and coadjutor) Sir Alexander Boyd, were attainted for high treason, whereby his peerage became forfeited. He was living Easter 1480/1, and died before October 1482, it is said, at Alnwick in Northumberland where he had fled in 1469.