As I, my real self, grew older, I entered more and more into the substance of my dreams. One may dream, and even in the midst of the dream be aware that he is dreaming, and if the dream be bad, comfort himself with the thought that it is only a dream. This is a common experience with all of us. And so it was that I, the modern, often entered into my dreaming, and in the consequent strange dual personality was both actor and spectator. And right often have I, the modern, been perturbed and vexed by the foolishness, illogic, obtuseness, and general all-round stupendous stupidity of myself, the primitive. And one thing more, before I end this digression. Have you ever dreamed that you dreamed? Dogs dream, horses dream, all animals dream. In Big-Tooth’s day the half-men dreamed, and when the dreams were bad they howled in their sleep. Now I, the modern, have lain down with Big-Tooth and dreamed his dreams. This is getting almost beyond the grip of the intellect, I know; but I do know that I have done this thing. And let me tell you that the flying and crawling dreams of Big-Tooth were as vivid to him as the falling-through-space dream is to you. For Big-Tooth also had an other-self, and when he slept that other-self dreamed back into the past, back to the winged reptiles and the clash and the onset of dragons, and beyond that to the scurrying, rodent-like life of the tiny mammals, and far remoter still, to the shore-slime of the primeval sea. I cannot, I dare not, say more. It is all too vague and complicated and awful. I can only hint of those vast and terrific vistas through which I have peered hazily at the progression of life, not upward from the ape to man, but upward from the worm. And now to return to my tale. I, Big-Tooth, knew not the Swift One as a creature of finer facial and bodily symmetry, with long-lashed eyes and a bridge to her nose and down-opening nostrils that made toward beauty. I knew her only as the mild-eyed young female who made soft sounds and did not fight. I liked to play with her, I knew not why, to seek food in her company, and to go bird-nesting with her. And I must confess she taught me things about tree-climbing. She was very wise, very strong, and no clinging skirts impeded her movements. It was about this time that a slight defection arose on the part of Lop-Ear. He got into the habit of wandering off in the direction of the tree where my mother lived. He had taken a liking to my vicious sister, and the Chatterer had come to tolerate him. Also, there were several other young people, progeny of the monogamic couples that lived in the neighborhood, and Lop-Ear played with these young people.