The certainty of the worlds of spirits and, consequently, of the immortality of souls : of the malice and misery of the devils and the damned : and of the blessedness of the justified, fully evinced by the unquestionable histories of apparitions, operations, witchcrafts, voices &c. / written, as an addition to many other treatises for the conviction of Sadduces and infidels, by Richard Baxter.