We have already examined the earliest date at which the kings who reigned in antiquity in the lower valley of Nile attempted to bring their actions into everlasting remembrance by pictures and writing. The oldest inscription preserved there dates from the period immediately preceding the erection of the great pyramids. The same impulse swayed the rulers of Babylon and Asshur, of whom we possess monuments reaching beyond the year 2000 B.C. The Hebrews also began at a very early time to record the fortunes of their progenitors and their nation. With the Indians the reverse is the case. Here neither prince nor people show the least interest in preserving the memory of their actions or fortunes. No other nation has been so late in recording their traditions, and has been content to leave them in so fragmentary a condition. For this reason, fancy is in India more lively, the treasures of poetry are more rich and inexhaustible. Thus it becomes the object of our investigation, from the remains of this poetry, and the wrecks of literature, to ascertain and reconstruct, as far as possible, the history of the Indians. From the first the want of fixed tradition precludes the attempt to establish in detail the course of the history of the Aryan states and their rulers. Our attempts are essentially limited to the discovery of the stages in the advance of the power of the Aryas in the regions where they first set foot, to the deciphering of the successive steps through which their religious views and intellectual culture were developed. And when we have thus exhumed the buried history of the Indians, we are assisted in determining its periods by the contact of the Indians with their western neighbours, the Persian kingdom, and the Greeks, and by the accounts of western writers on these events. The oldest evidence of the life of the Aryas, whose immigration into the region of the Indus and settlement there we have been able to fix about 2000 _B.C._, is given in a collection of prayers and hymns of praise, the Rigveda, _i.e._ "the knowledge of thanksgiving." It is a selection or collection of poems and invocations in the possession of the priestly families, of hymns and prayers arising in these families, and sung and preserved by them. In the ten books which make up this collection, the poems of the first book are ascribed to minstrels of various families; in some the minstrel is even named. "This song was made by Dirghatamas, of the race of Angiras;" "this new hymn was composed by Nodhas, a descendant of Gautama." Of the other books, each is ascribed to a single family of priests--to the Gritsamadas, Viçvamitras, Vamadevas, Atris, Bharadvajas, Vasishthas, and Kanvas. The tenth book contains isolated pieces which found no place in the earlier books; several of these pieces bear the stamp of a later origin, as they exhibit a more complicated ritual, the operation of various classes of priests, and reflections of an abstract character.[49]