“DEAR SIR: I am much obliged for your kind note and present of your lectures. I am extremely glad to have received them from you, and I had intended ordering them. “I feel quite sure from what I have read in your work, that you would never say anything to an honest adversary to which he would have any just right to object; and as for myself, you have often spoken highly of me, perhaps more highly than I deserve. “As far as language is concerned, I am not worthy to be your adversary, as I know extremely little about it, and that little learnt from very few books. I should have been glad to have avoided the whole subject, but was compelled to take it up as well as I could. He who is fully convinced, as I am, that man is descended from some lower animal, is almost forced to believe, _a priori_, that articulate language has been developed from inarticulate cries, and he is therefore hardly a fair judge of the arguments opposed to this belief.” With cordial respect I remain, dear sir, Yours very faithfully, Charles Darwin. ” This will at all events show that a man who could look upon a chimpanzee as his equal, did not entirely ignore, as an uninformed layman, a poor philologist. Darwin did not in the least disdain the uninformed layman. He thought and wrote for him, and there is scarcely one of Darwin’s books that cannot be read by the uninformed layman with profit. And in the interchange of acquired facts or ideas, mental science has at least as much right as natural science. We live, it is true, in different worlds. What some look upon as the real, others regard as phenomenal. What these in their turn look upon as the real, seems to the first to be non-existent. It will always be thus until philology has defined the true meaning of reality.