There is nothing strange in this, any more than there is anything strange in an instinct. An instinct is merely a habit that is stamped into the stuff of our heredity, that is all. It will be noted, in passing, that in this falling dream which is so familiar to you and me and all of us, we never strike bottom. To strike bottom would be destruction. Those of our arboreal ancestors who struck bottom died forthwith. True, the shock of their fall was communicated to the cerebral cells, but they died immediately, before they could have progeny. You and I are descended from those that did not strike bottom; that is why you and I, in our dreams, never strike bottom. And now we come to disassociation of personality. We never have this sense of falling when we are wide awake. Our wake-a-day personality has no experience of it. Then—and here the argument is irresistible—it must be another and distinct personality that falls when we are asleep, and that has had experience of such falling—that has, in short, a memory of past-day race experiences, just as our wake-a-day personality has a memory of our wake-a-day experiences. It was at this stage in my reasoning that I began to see the light. And quickly the light burst upon me with dazzling brightness, illuminating and explaining all that had been weird and uncanny and unnaturally impossible in my dream experiences. In my sleep it was not my wake-a-day personality that took charge of me; it was another and distinct personality, possessing a new and totally different fund of experiences, and, to the point of my dreaming, possessing memories of those totally different experiences. What was this personality? When had it itself lived a wake-a-day life on this planet in order to collect this fund of strange experiences? These were questions that my dreams themselves answered. He lived in the long ago, when the world was young, in that period that we call the Mid-Pleistocene. He fell from the trees but did not strike bottom. He gibbered with fear at the roaring of the lions. He was pursued by beasts of prey, struck at by deadly snakes. He chattered with his kind in council, and he received rough usage at the hands of the Fire People in the day that he fled before them. But, I hear you objecting, why is it that these racial memories are not ours as well, seeing that we have a vague other-personality that falls through space while we sleep? And I may answer with another question. Why is a two-headed calf? And my own answer to this is that it is a freak. And so I answer your question. I have this other-personality and these complete racial memories because I am a freak. But let me be more explicit.