It is related in old books of curious lore and legend, that once there dwelt in Britain a wealthy miller, who was very miserly and who had a fair daughter, his only child.  A spirit of the air, called Incubus—a sort of malicious demon, quite common in those days—fell in love with the miller's daughter, so runs the story, and demanded her for his wife; and though the maiden detested him, his suit was successful, as he offered to give the miller a ton of gold in exchange for his daughter's hand.
    So the unwilling maiden was married to the demon; who promptly redeemed his promise, after the manner of demons, by tumbling a ton of gold upon the miller's head.
    However, as it proved, the miller's daughter was not unhappy with her demon spouse; and of this union were born the twin enchanters, Merlin and Eliaures.  Both were powerful in arts of sorcery... Eliaures, however, inherited all the malice and wickedness of his demon sire, and from the hour of his birth, he began to work mischief among men.  This greatly grieved the enchanters' mother, and she induced Merlin to promise her that he would never neglect an opportunity to thwart the evil designs of Eliaures. (Ballou's Monthly Magazine, v.67, 1888)