Even when a child begins to take in the fact that there was a time when he was not, he is unable to think of absolute non-existence. A little girl of three being shown a photograph of her family and not seeing her own face in the group asked: "Where is me?" Being duly instructed that she was not here, or indeed anywhere, she asked: "Was I killed?" It is curious to note the differences in the attitude of children's minds towards this mystery, "before you were born". A child accustomed to be made the centre of others' interest may be struck with the blank in the common home life before his arrival. A little girl of three, on being told by her mother of something which happened long before she was born, asked in amazement: "And what did you do without H.? Did you cry all day for her?" Sometimes again, in the more metaphysical sort of child, the puzzle relates to the past existence of the outer world. We have all been perplexed by the thought of the earth and sky, and other folk existing before we were, and going on to exist after we cease to be; though here again we are apt to "get used" to the puzzle. Children may be deeply impressed with this apparent contradiction. Jean Ingelow in the interesting reminiscences of her childhood writes: "I went through a world of cogitation as to whether it was really true that anything had been and lived before I was there to see it". A little boy of five who was rather given to saying "clever" things, was one day asked by a visitor, who thought to rebuke what she took to be his conceit: "Why, M., however did the world go round before you came into it?" M. at once replied: "Why, it _didn't_ go round. It only began five years ago." This child, too, had probably felt little Jean Ingelow's difficulty. A child will sometimes try to escape from this puzzle by way of the supernatural ideas already referred to. If of quick intelligence he will see in the legend of babies brought from heaven to earth a way of prolonging his existence backwards. The same little boy that was so concerned to know what his mother had done without him, happened one day to be passing a street pump with his mother, when he stopped and observed with perfect gravity: "There are no pumps in heaven where I came from". He had evidently worked out the idea of heaven-sent babies into a theory of pre-natal existence. In thinking of their past, children have to encounter that terrible mystery, time. They seem at first quite unable to think of time as we think of it, in an abstract way. "To-day," "to-morrow" and "yesterday" are spoken of as things which move. A girl of four asked: "Where is yesterday gone to?" and "Where will to-morrow come from?"