They do not merely inform (there the scientist may transcend them), they enrich the subtle relationship between us and our environment. Move a civilization and its literature from one hemisphere to another, and their adapting, adjusting services become most valuable. Men like Thoreau are worth more than we have ever guessed. No one has ever written more honest books than Thoreau's "Walden," his "Autumn," "Summer," and the rest. There is not one literary flourish in the whole of them, although they are done with consummate literary care; nothing but honest, if not always accurate, observation of the world of hill-slopes, waves, flowers, birds, and beasts, and honest, shrewd philosophizing as to what it all meant for him, an American. Here is a man content to take a walk, fill his mind with observation, and then come home to think. Repeat the walk, repeat or vary the observation, change or expand the thought, and you have Thoreau. No wonder he brought his first edition home, not seriously depleted, and made his library of it! Thoreau needs excerpting to be popular. Most nature books do. But not to be valuable! For see what this queer genius was doing. Lovingly, laboriously, and sometimes a little tediously, he was studying his environment. For some generations his ancestors had lived on a new soil, too busy in squeezing life from it to be practically aware of its differences. They and the rest had altered Massachusetts. Massachusetts had altered them. Why? To what? The answer is not yet ready. But here is one descendant who will know at least what Massachusetts _is_--wave, wind, soil, and the life therein and thereon. He begins humbly with the little things; but humanly, not as the out-and-out scientist goes to work, to classify or to study the narrower laws of organic development; or romantically as the sentimentalist, who intones his "Ah!" at the sight of dying leaves or the cocoon becoming moth. It is all human, and yet all intensely practical with Thoreau. He envies the Indian not because he is "wild," or "free," or any such nonsense, but for his instinctive adaptations to his background,--because nature has become traditional, stimulative with him. And simply, almost naively, he sets down what he has discovered. The land I live in is like this or that; such and such life lives in it; and this is what it all means for me, the transplanted European, for us, Americans, who have souls to shape and characters to mold in a new environment, under influences subtler than we guess. "I make it my business to extract from Nature whatever nutriment she can furnish me, though at the risk of endless iteration. I milk the sky and the earth." And again: "Surely it is a defect in our Bible that it is not truly ours, but a Hebrew Bible. The most pertinent illustrations for us are to be drawn not from Egypt or Babylonia, but from New England. Natural objects and phenomena are the original symbols or types which express our thoughts and feelings.