Polybius, as you will find in reading of him, though he principally intended the history of the Romans, and the establishment of their empire over the greatest part of the world which was then known, yet had in his eye the general history of the times in which he lived, not forgetting either the wars of his own country with their neighbours of Etolia, or the concurrent affairs of Macedonia and the provinces of Greece, which is properly so called; nor the monarchies of Asia and Egypt; nor the republic of the Carthaginians, with the several traverses of their fortunes, either in relation to the Romans, or independent to the wars which they waged with them; besides what happened in Spain and Sicily, and other European countries. The time, which is taken up in this history, consists of three-and-fifty years; and the greatest part of it is employed in the description of those events, of which the author was an eye-witness, or bore a considerable part in the conduct of them. But in what particular time or age it was, when mankind received that irrecoverable loss of this noble history, is not certainly delivered to us. It appears to have been perfect in the reign of Constantine, by what I have already noted; and neither Casaubon, nor any other, can give us any further account concerning it. The first attempt towards a translation of him, was by command of the same Pope Nicholas the Fifth, already mentioned, who esteemed him the prince of Greek historians; would have him continually in his hands; and used to make this judgement of him,--that, if he yielded to one or two, in the praise of eloquence, yet, in wisdom, and all other accomplishments belonging to a perfect historian, he was at least equal to any other writer, Greek or Roman, and perhaps excelled them all. This is the author, who is now offered to us in our mother-tongue, recommended by the nobility of his birth, by his institution in arts and sciences, by his knowledge in natural and moral philosophy, and particularly the politics; by his being conversant both in the arts of peace and war; by his education under his father Lycortas, who voluntarily deposed himself from his sovereignty of Megalopolis to become a principal member of the Achaian commonwealth, which then flourished under the management of Aratus; by his friendship with Scipio Africanus, who subdued Carthage, to whom he was both a companion and a counsellor; and by the good-will, esteem, and intimacy, which he had with several princes of Asia, Greece, and Egypt, during his life; and after his decease, by deserving the applause and approbation of all succeeding ages.