A human skull, let us say, and some bones of extinct animals, and some chipped flints are all discovered side by side some twenty feet below the level of the soil.

At least four separate authorities must be called in before the parts of the puzzle can be fitted together.
Again, he must be taught something about race, or inherited breed, as it applies to man.

A dose of practical anatomy--that is to say, some actual handling and measuring of the principal portions of the human frame in its leading varieties--will enable our beginner to appreciate the differences of outer form that distinguish, say, the British colonist in Australia from the native "black-fellow," or the whites from the negroes, and redskins, and yellow Asiatics in the United States.

At this point, he may profitably embark on the details of the Darwinian hypothesis of the descent of man.

Let him search amongst the manifold modern versions of the theory of human evolution for the one that comes nearest to explaining the degrees of physical likeness and unlikeness shown by men in general as compared with the animals, especially the man-like apes; and again, those shown by the men of divers ages and regions as compared with each other.