In Indonesia, the home of the orang-utan and gibbon, not to speak of Pithecanthropus, many authorities would place the original home of the human race.

It will be wise to touch lightly on matters involving considerations of palaeo-geography, that most kaleidoscopic of studies.

The submerged continents which it calls from the vasty deep have a habit of crumbling away again.

Let us therefore refrain from providing man with land-bridges (draw-bridges, they might almost be called), whether between the Indonesian islands; or between New Guinea, Australia and Tasmania; or between Indonesia and Africa by way of the Indian Ocean.

Let the curious facts about the present distribution of the racial types speak for themselves, the difficulties about identifying a racial type being in the meantime ever borne in mind.
Most striking of all is the diffusion of the Negro stocks with black skin and woolly hair.