ancient times, yet, by a study of the Hindoos as they are at present, we may furnish ourselves with a tolerably accurate idea of the nature of that ancient civilization which overspread Hindoostan many centuries before the birth of Christ, and this all the more probably that the notices which remain of the state of India at the time of the invasion of Alexander, correspond in many points with what is to be seen in India at the present day. The population of Hindoostan, the area of which is estimated at about a million square miles, amounts to about 120,000,000; of whom about 100,000,000 are Hindoos or aborigines, the remainder being foreigners, either Asiatic or European. The most remarkable feature in Hindoo society is its division into castes. The Hindoos are divided into four great castes――the _Brahmins_, whose proper business is religion and philosophy; the _Kshatriyas_, who attend to war and government; the _Vaisyas_, whose duties are connected with commerce and agriculture; and the _Sudras_, or artisans and laborers. Of these four castes the Brahmins are the highest; but a broad line of distinction is drawn between the Sudras and the other three castes. The Brahmins may intermarry with the three inferior castes――the kshatriyas with the vaisyas and the Sudras; and the vaisyas with the Sudras; but no Sudra can choose a wife from either of the three superior castes. As a general rule, every person is required to follow the profession of the caste to which he belongs: thus the Brahmin is to lead a life of contemplation and study, subsisting on the contributions of the rich; the Kshatriya is to occupy himself in civil matters, or to pursue the profession of a soldier; and the Vaisya is to be a merchant or a farmer. In fact, however, the barriers of caste have in innumerable instances been broken down. The ramifications, too, of the caste system are infinite. Besides the four pure, there are numerous mixed castes, all with their prescribed ranks and occupations. A class far below even the pure Sudras is the _Pariahs_ or outcasts; consisting of the refuse of all the other castes, and which, in process of time, has grown so large as to include, it is said, one-fifth of the population of Hindoostan. The Pariahs perform the meanest kinds of manual labor. This system of castes――of which the Brahmins themselves, whom some suppose to have been originally a conquering race, are the architects, if not the founders――is bound up with the religion of the Hindoos. Indeed of the Hindoos, more truly than of any other people, it may be said that a knowledge of their religious system is a knowledge of the people themselves. [Illustration: AGA.] [Illustration: JAPANESE AGRICULTURE]