Apparently the taste for Duncan Campbell anecdotes was stimulated by the piquant sauce of scandal, for beside the several issues of "A Spy upon the Conjurer" a second and smaller volume of the same sort was published on 10 May, 1725. This sixpenny pamphlet of forty pages, entitled "The Dumb Projector: Being a Surprizing Account of a Trip to Holland made by Mr. Duncan Campbell. With the Manner of his Reception and Behaviour there. As also the various and diverting Occurrences that happened on his Departure," was, like the former work, couched in the form of a letter to a nobleman and signed "Justicia." Both from internal evidence[9] and from the style it can be assigned with confidence to the author of "A Spy upon the Conjurer." The story, relating how Mr. Campbell was induced to go into Holland in the hope of making his fortune, how he was disappointed, the extraordinary instances of his power, and his adventures amatory and otherwise, is of little importance as a narrative. The account differs widely from that of Campbell's trip to the Netherlands in the "Life and Adventures" of 1720. Soon after the publication of "The Dumb Projector" Defoe also made a second contribution to the now considerable Duncan Campbell literature under the title of "The Friendly Daemon: or, the Generous Apparition. Being a True Narrative of a Miraculous Cure newly performed upon ... Dr. Duncan Campbell, by a familiar Spirit, that appeared to him in a white surplice, like a Cathedral Singing Boy." The quotation of the story from Glanvil already used by the prophet's original biographer, and the keen interest in questions of the supernatural displayed by the writer, make the attribution of this piece to Defoe a practical certainty. Evidently, then, Eliza Haywood was not the only one to profit by keeping alive the celebrity of the fortune-teller.