With the development of these arts history proper is not concerned, but this is not because the development of these arts would not constitute true history if its course were known, but simply because of our entire ignorance of all details of the subject. In order to gain a clearer idea, however, of the status of human culture at the dawn of history proper, it may be worth while to glance in the most cursory way at each of the great inventions and developments upon which the entire structure of civilisation depends. _First. Language._ Perhaps the greatest single step ever made in the history of man’s upward progress was taken when the practice of articulate speech began. It would be contrary to all that we know of human evolution to suppose that this development was a sudden one, or that it transformed a non-human into a human species at a sudden vault. It is well known that many of the lower animals are able to communicate with one another in a way that implies at least a vague form of speech, and it has been questioned whether the higher species of apes do not actually articulate in a way strictly comparable to the vocalisation of man. Be that as it may, the clear fact remains that one species of animal did at a very remote time in the past develop the power of vocalisation in the direction of articulate speech to a degree that in course of time broadened the gap between that species and all others, till it became an impassable chasm. Without language of an explicit kind not even the rudiments of civilisation would be possible. No one perhaps ever epitomised the value of articulate speech in a single phrase more tellingly than does Herder when he says: “The lyre of Amphion has not built cities. No magic wand has transformed deserts into gardens. Language has done it,--that great source of sociality.” Obviously, then, could we know the history of the evolution of articulate speech it would be one of the very greatest chapters in all human records; but it is equally obvious that we can never hope to know that history except inferentially. When the dawn of history proper came, man had so long practised speaking that he had developed countless languages so widely divergent from one another that they are easily classified into several great types. From the study of these languages the philologist draws more or less valid inferences as to the later stages of linguistic growth and development. But he gains no inklings whatever as to any of those earlier developments which constituted the origin or the creation of language. _Second. Clothing and Housing of Prehistoric Man._