This text-book is intended for college and high-school classes. Most of the facts stated in it have become, through the researches and publications of recent years, such commonplace knowledge that a reference to authority in each case has not seemed necessary. Statements on more doubtful points, and such personal opinions as I have had occasion to express, although not supported by references, are based on a somewhat careful study of the sources. To each chapter is subjoined a bibliographical paragraph with the titles of the most important secondary authorities. These works will furnish a fuller account of the matters that have been treated in outline in.