2023 Reprint of the 1943 edition. Full facsimile of the original edition and not reproduced with Optical Recognition Software. The purpose of this small volume is to render available in compact and simple form the leading facts of astrological history. Our treatise is by no means complete--the subject is entirely too vast to be enclosed by the narrow covers of so slight a work. Yet as few historians have appeared to present the claims of the ancient science to an unbelieving world since Sir Christopher Heydon compiled his celebrated Defense of Judicial Astrology in 1603, it would seem that some effort in this direction is not untimely. We have gathered our data from many sources, most of which are acknowledged in the text or footnotes and recommend that those who choose to explore more deeply into the subject should examine carefully the volumes referred to. The purpose of work is twofold; first, to supply students of astrology with some tangible data concerning the antiquity, dignity and significance of the science; and, second, to correct misconceptions relating to the subject which have been deliberately promulgated by prejudiced scientists and theologians.