But, laying aside these geological facts and observations, ideas and conjectures, the philosophic historian can reckon over the whole surface of the globe but fifteen historical and important civilized countries of greater or less extent, which can form the subject, and furnish the geographical outline of his remarks. This historical chain of lands, or this stream of historical nations from the south-east of Asia to the Northern and Western extremities of Europe, forms a tract, through both continents, which though of considerable breadth, is not, in proportion to the extent of these continents, of very great magnitude, and which may be divided into three classes, coinciding chronologically in their several periods of historical glory and development with the great eras or sections of universal history from the primitive ages down to the present times. In the first class of these mighty and celebrated civilized countries, I would place the three great magnificent regions in Eastern and Southern Asia, China, India, between which the ancient Bactriana forms a point of transition and connecting link--and lastly Persia. In a more westerly and somewhat more northerly direction than the three countries just named, the second or middle class is composed of four or five regions remarkable for extent and beauty, and above all for their historical importance and celebrity. First of all, there is that middle country of Western Asia above-mentioned, which is situate near two great streams--the Tigris and the Euphrates, and bounded by four inland seas, the Persian and Arabian gulfs, and the Caspian and Mediterranean seas. Upon this midland country of ancient history, in every respect so worthy of notice, I have but one observation to add, that in this great series of civilized countries it occupies nearly the middle place; for the Southern extremity of India is about as far removed from it as, in the opposite direction, the North of Scotland. And the Eastern part of China is not much more distant from this region than in the opposite quarter the Western coast of the Hesperian Peninsula. Next must be included in this class the circumjacent countries, Arabia, Egypt, and Asia Minor, together with the Caucasian regions.