 From the Countess Margaret's death in 1417 Bunkle passed to her son George Douglas, 1st Earl of Angus, with whose descendants it remained until the late 18th century.In the late 18th century ownership of Bunkle Castle passed to the Earls of Home.A popular Berwickshire rhyme refers to the medieval strengths of Bonkyll and the nearby fortresses of Billie Castle, and Blanerne Castle referring to their construction in the time of David I