Although mountains may guide migrations, the plains are the regions where people dwell in greatest numbers.

The whole history of life is a record of cycles.

Man could not stay there forever. He was bound to spread to new regions, partly because of his innate migratory tendency and partly because of Nature's stern urgency.

The buffalo is a surprisingly stupid animal.

With every throb of the climatic pulse which we have felt in Central Asia,, the centre of civilisation has moved this way and that. Each throb has sent pain and decay to the lands whose day was done, life and vigour to those whose day was yet to be.

No part of the world can be truly understood without a knowledge of its garment of vegetation, for this determines not only the nature of the animal inhabitants but also the occupations of the majority of human beings.

We are learning, too, that the love of beauty is one of Nature's greatest healers.