If any be moved that I seem to maintain some things that are Paradoxes, I hope I may crave leave, as well to discede from the opinions of others, as others have done from those that went before them. And I desire them not so much to consider, either the novelty or strangeness of the opinions, as the weight and strength of the reasons that are laid down to support and statuminate them; for if the arguments be sound and valid, the Tenents built thereupon cannot be weak and tottering. And however I acknowledge my self to have humane frailties and so may err, yet I have no mind or will pertinaciously to persevere in an error, and these things that we have treated of lying so far from the ken of our senses, and experiments of this nature, either so rare, or uncertain, that we may rationally expect pardon, rather than reprehension. But I shall say no more, but let the Book speak for it self, only desiring the Readers, first to peruse and seriously to consider, before they censure, that so I may have cause to bid them, Farewel. Dated _February 23. 1673_. THE CONTENTS. Chap. 1. _Of the false, irrational, and unchristian censures, that have been, and yet are cast upon learned Men for writing of abstruse subjects: As also for treating of Apparitions and Witchcraft, especially if they crossed the common stream of vulgar opinion._ Page 1. Chap. 2. _Of the Notion, Conception, and Description of Witches and Witchcraft according to divers Authors, and in what sense they may be granted, and in what sense and respect they are denied._ p. 19. Chap. 3. _The denying of such a Witch as is last described in the foregoing Chapter doth not infer the denying of Angels, or Spirits. Apparitions no warrantable ground for a christian to believe the existence of Angels, or Devils by, but the word of God._ p. 37. Chap. 4. _That the Scriptures, and sound reason are the true and proper mediums to prove the actions attributed unto Witches by, and not other improper ways that many Authors have used. And of the requisites necessary truly to prove a matter of fact by._ p. 43. Chap. 5. _That these things now in question, are but barely supposed, and were yet never rationally nor sufficiently proved: And that the Allegations brought to prove them by are weak, frivolous, and absolutely invalid: with a full confutation of all the four particulars._ p. 63.