Men who will not believe such things as these, so well attested to us, and given us by such authorities, because they did not see them themselves, nor anything of the like nature, ought not only to deny the demon of Socrates, but that there was such a man as Socrates himself; they should not dispute the genii of Caesar, Cicero, Brutus, Marc Antony, but avow that there were never any such men existing upon earth, and overthrow all credible history whatsoever. Meanwhile, all men, but those who run such lengths in their fantastical incredulity, will, from the facts above mentioned, rest satisfied, that there are such things as evil and good genii, and that men have sometimes a commerce with them by all their senses, particularly those of seeing and hearing, and will not therefore be startled at the strange fragments of histories which I am going to relate of our young Duncan Campbell, and look upon some wonderful adventures which he performed by the intervention of his familiar demon or genius, as falsehoods, only because they are uncommon and surprising, more especially since they were not done in a corner, but by an open way of profession of a predictor of things, in the face of the metropolis of London, where he settled young, as will appear in the progress of his life. However, some people, notwithstanding all this, may allege, that though a man may have a genius appear to him, so as to convey into his mind, through his senses, the knowledge of things that are to come to pass, yet this happens but on very eminent and extraordinary occasions. The murder, for example, of a prime minister, and the favourite of a monarch, in such a manner as it was performed on the great Duke of Buckingham, by Felton, was a thing so uncommon, that it might perhaps deserve, by the permission of Heaven, an uncommon prediction; the others likewise are instances eminent in their way, particularly that of the lady Everard's niece; for that young lady being then marriageable, and a treaty for that end being on foot with Sir William Perkins, the Divine Providence foreseeing that such a state might call away her thoughts, hitherto bent on him and spiritual affairs, and fix them on the trifles of this world, might perhaps permit her to be called by a holy mother to the state of happiness she before her enjoyed, lest her daughter's mind should change, and she go into the ways of a sinner. But if these supereminent, these scarce and rare examples, may be admitted of man's holding a conversation with the spiritualized beings of another world; it will, however, be far below the dignity of human reason, methinks, to make such large concessions to people who pretend to converse that wonderful way, as to allow them the credit of being able to do it upon every slight occasion, and every indifferent occurrence of human life.