THERE is perhaps nothing extraordinary in the fact that man is wise and just, takes great care to provide for his own children, -shows due consideration for his parents, seeks sustenance for himself, protects himself against plots, and possesses all the other gifts of nature which are his. For man has been endowed with speech, of all things the most precious, and has been granted reason, which is of the greatest help and use. Moreover, he knows how to reverence and worship the gods. But that dumb animals should by nature possess some good quality and should have many of man's amazing excellences assigned to them along with man, is indeed a remarkable fact. And to know accurately the special characteristics of each, and how living creatures also have been a source of interest no less than man, demands a trained intelligence and much learning. Now I am well aware of the labour that others have expended on this subject, yet I have collected all the materials that I could; I have clothed them in untechnical language, and am persuaded that my achievement is a treasure far from negligible. So if anyone considers them profitable, let him make use of them; anyone who does not consider them so may give them to his father to keep and attend to. For not all things give pleasure to all men, nor do all men consider all subjects worthy of study. Although I was born later than many accomplished writers of an earlier day, the accident of date ought not to mulct me of praise, if I too produce a learned work whose ampler research and whose choice of language make it deserving of serious attention.