Cranium, cranial sutures, frontal process, nasal bones, eye, chin, jaws, wisdom teeth, hair, humerus, pelvis, the heart-line across the hand, calf, tibia, heel, colour, and even smell--all these external signs, as well as many more, have been thought, separately or together, to afford the crucial test of a man's pedigree.

Clearly I cannot here cross-examine the entire crowd of claimants, were I even competent to do so.

I shall, therefore, say a few words about two, and two only, namely, head-form and colour.
I believe that, if the plain man were to ask himself how, in walking down a London street, he distinguished one racial type from another, he would find that he chiefly went by colour.

In a general way he knows how to make allowance for sunburn and get down to the native complexion underneath.

But, if he went off presently to a museum and tried to apply his test to the pre-historic men on view there, it would fail for the simple reason that long ago they left their skins behind them.
He would have to get to work, therefore, on their bony parts, and doubtless would attack the skulls for choice.