he student who seeks to understand how mankind came to be as they are, and to live as they do, ought first to know clearly whether men are new-comers on the earth, or old inhabitants. Did they appear with their various races and ways of life ready-made, or were these shaped by the long, slow growth of ages? In order to answer this question, our first business will be to take a rapid survey of the varieties of men, their languages, their civilization, and their ancient relics, to see what proofs may thus be had of man's age in the world. The outline sketch thus drawn will also be useful as an introduction to the fuller examination of man and his ways of life in the chapters which follow.