"However for a great Part of the Summer he did almost every Week spend a Day by himself in the Exercise of a secret Fast before the Lord. On these Days he cried unto God, not only for his own Preservation from the Malice and Power of the evil Angels, but also for a good Issue of the Calamities in which he had permitted the evil Angels to ensnare the miserable Country. He also besought the Lord that he would enable him, prosper, direct, and accept him in publishing such Testimonies for Him as were proper, and would be serviceable unto his Interests on that Occasion. "And that a right Use might be made of the prodigious Things which had been happening among us, he now composed and published his Book entituled, _The Wonders of the Invisible World_, which was reprinted several Times in London: In the Preface he speaks of, '_the heart-breaking Exercises_', he went thro' in writing it. There was a certain Disbeliever of Witchcraft who wrote against this Book; but as the Man is dead, his Book died long before him.[31] "But having spoken eno' of the more publick Witchcraft, I think I will hale in here an Account of a Witchcraft happening in one private Family at Boston, two or three Years before the general one. 'Twas, I think, in the Year 1689, in the Winter, that several Children belonging to a pious Family at the South End of Boston were horribly bewitch'd and possessed.[32] "Mr. Mather tho't it would be for the Glory of God, if he not only pray'd with as well as for the Children; but also took an Account of the extraordinary Symptoms which attended them, with sufficient Attestations to confound the Sadducism and Atheism of a debauched Age." An Account of the Case of the Goodwin Family was separately published, and was noticed with Commendation by the "learned and pious Baxter," which has been often referred to as a Proof that other great Men, as well as Mr. Mather, were Believers in Witchcraft. The Novelty and Singularity of a Thing was no Cause of its Rejection by Mr. Mather, and we next find him advocating Inoculation for the Small-pox; and, according to his Biographer he was the Cause of its Introduction into this Country. But in that, as in many other Things, too much is claimed for him. I have elsewhere given a History of its being put in Practice in Boston.[33] In 1714 Dr. Mather was chosen a Member of the Royal Society of London; upon which Event his Biographer remarks: "The Respect which the Royal Society paid him, did also very much encourage him, and fortify him in his Essays to do Good, while it added to the superior Circumstances in which he was placed above the Contempt of Envious Men."