Letters to Serena:: Containing, I. The Origin and Force of Prejudices. II. The History of the Soul's Immortality Among the Heathens. III. The Origin of Idolatry, and Reasons of Heathenism. As Also, IV. A Letter to a Gentleman in Holland, Showing Spinosa's System of Philosophy to be Without Any Principle Or Foundation. V. Motion Essential to Matter; in Answer to Some Remarks by a Noble Friend on the Confutation of Spinosa. To All which is Prefix'd, VI. A Preface; Being a Letter to a Gentleman in London; Sent Together with the Foregoing Dissertations, and Declaring the Several Occasions of Writing Them