Between the Date of his last Letter and the 19th of February, 1693-4, instead of answering Mr. Calef's Letter, Dr. Mather sent him Word that his Library was open to him, intimating that he might find there Answers to any and all of his Objections and Difficulties. But Mr. Calef did not avail himself of the Kindness thus tendered, though he thanked him by Letter, and at the same Time complained that he had not written him, pointing out what he conceived to be Errors in his former Communications; adding, "if you think Silence a Virtue in this Case, I shall (I suppose) so far comply with it as not to loose you any more Time to look over my Papers." This however did not end the Correspondence; for on the 16th of April following he addressed a Letter to the Doctor, calling his Attention to certain Passages in the _Wonders of the Invisible World_, and some other "late Books of his and his Relations." After stating a few of the Author's strange Assertions, such as that the Devil causes Wars, Plagues, and other Calamities; that the Devil is a great Linguist; that Suicides "are the Effects of a cruel & bloody Witchcraft," and several other similar Quotations. In closing this Letter, he remarks that he is only performing what he believes to be his Duty; that he is far from doing it to gain Applause, or from a Love of Contention; that, on the other Hand, he expected to make many Enemies by it. The next Letter which he wrote to Mr. Mather was dated March the 1st, 1694-5. In this he says he had waited more than a Year "for the Performance of a reiterated Promise" from him, to reply to Arguments which he had sent for his Refutation or Approval. Instead of that promised Answer, he had received, through the Hand of a third Person, "four Sheets of recinded Papers." These were delivered under an Injunction that no Copy was to be taken of them, and he was allowed to keep them but a Fortnight. He has given some Account of those "four Sheets," and observes that he does not wonder at not being allowed to copy them, as they contained so much "crude Matter and impertinent Absurdities." Among other Things, he sent Mr. Calef Baxter's _World of Spirits_, characterizing it an _ungainsayable_ Book; upon which Mr. Calef remarks, as aptly as significantly, that he knows of no "ungainsayable" Book but the Bible, and thinks no other Man who had ever read it would so style it except its Author. He is probably correct when he attributes to Mr. Baxter the Weakness incident to old Age, in allowing his Name to appear as the Author of _The Certainty of the World of Spirits_. But his own Words are more to the Point: "As to the sometime Reverend Author, let his Works praise the Remembrance of him; but for such as are either Erroneous and foisted upon him, or the Effect of an aged Imbecility, let them be detected that they may proceed no further."