Dr Mather, in his work entitled 'Wonders of the Invisible World,' produced an abridgment of the trials of the two women condemned by Lord Hale, 1664, and also an abridgment of the rules and signs by which witches are to be discovered, of which he says there are above thirty. His production received the approbation of two of the judges of the court, one of whom was the chief justice and lieutenant governor. The author's father, Dr Increase Mather, also expressed his coincidence in the same sentiments. The work is, nevertheless, a singular and curious production; it evinces, most clearly, that the reverend author, in the fervency of zeal, suffered his mind to be deeply imbued with bigotry and depressing superstition. Dr Mather was eminent for extensive knowledge and Christian piety; but foibles and infirmities were his lot, and while his mind was enriched with knowledge, his heart must have sickened for lack of wisdom. He published 382 books and tracts on various subjects. In these he displays wit and fancy, and advocates with zeal the cause of religion; and although his style is singular and verbose, his works contain rich and important matter for the historian and antiquary. It would be unjust not to acknowledge the debt of gratitude due to Dr Mather for the immeasurable benefits which our country and the world have enjoyed from his efforts to introduce smallpox inoculation, in 1721. But the work now in question affords a striking example of the imbecility of mind in the absence of its glorious attributes. Sobriety of judgment is seduced by folly, and moral dignity is degraded by the intrusion of fictions of imagination, and the man becomes a dupe to his own credulity. He adopted, in the fullest extent, the doctrine of demons, and of supernatural compacts between Satan and witches, and was fatally blinded against the most palpable impositions practised on himself. But this distinguished divine was not singular in his proneness to bigoted and dogmatical principles and doctrines; they were in perfect coincidence with the habits of thinking in the times in which he lived. His cotemporaries, who administered the affairs of government, and those who were called to decide in their judicial proceedings, had evidently imbibed the same gross absurdities; and there is in our nature an unaccountable reluctance to discard errors, however preposterous. His publication teems with romantic and ludicrous stories, which he unwisely adduces for substantial facts. A shrewd reply was made to it by R. Calef, a merchant of Boston, which led to a controversy between the two authors, on the subject of their inquiry. The following is an abridged narrative of the trials of B. Bishop, S. Martin, E. How, and M. Carryer, from Dr Mather's 'Wonders of the Invisible World.'