It is often said that all the birds of a species build their nests in precisely the same way, and that, while men change and improve their dwelling-places from generation to generation, birds build their abodes in the same old way, just as their ancestors built theirs centuries and centuries ago. This is a favourite thought with the fogies, with those who change not in their thinking from the ways hacked out for them centuries and centuries ago. Birds are like men. Some of them—some races and some individuals—are much more given to initiative than others. There is as wide a difference between the hang-bird and the auk in the construction of their domiciles as between the millionaire and the savage. And the hang-bird has come by her home-making art through centuries of improvement, just as the millionaire has arrived at his. It is believed by ornithologists that the first nests of birds were the niches of rocks or simple hollows scooped in the sand and soil, such as are still seen among the more primitive bird races, and that from these aboriginal beginnings have come, through ages of evolution, the elaborate creations of the cotton-bird, weaver-bird, tailorbird, oven-bird, the baya-sparrow, the finches, and the orioles. The savage who lives unmolested generation after generation in the same land and country builds his simple hut in just the same way as his ancestors built theirs, and thinks the same things his ancestors thought a thousand years before him. Sir Samuel Baker, in a paper on ‘The Races of the Nile Basin,’ points out that each tribe of men in eastern Africa, like each species of bird, has its own peculiar style of hut, and that the huts of the various tribes are as constant in their types as are the nests of birds. The same thing is true of their headdresses as of their huts; and this fixed character exists also in their languages, customs, and religions. It is only some races of men that are given to growth and fluidity, and only some men of these special races. Right in our own country, among the remote mountain recesses of Appalachia, surrounded on all sides by the most wonderful development, material and intellectual, the world has ever seen, lives a race of rude mountain folk almost as aboriginal in their ways and views of life, and as unaffected by civilisation, as if they were in the heart of Africa. They live huddled together in one-room log-cabins without windows or floors, eat bacon and cornmeal, carry on almost constant wars, and execute the deputies of civilisation who happen to stray into their illicit dominions, just as they have done from the time these mountain silences were first broken by them 150 or 200 years ago.