Very interesting in connexion with the first stages of development of the idea of self is the experience of the mirror. It would be absurd to expect a child when first placed before a mirror to recognise his own face. He will smile at the reflexion as early as the tenth week, though this is probably merely an expression of pleasure at the sight of a bright object. If held in the nurse’s or father’s arms to a glass when about six months old a baby will at once show that he recognises the image of the familiar face of the latter by turning round to the real face, whereas he does not recognise his own. He appears at first and for some months to take it for a real object, sometimes smiling to it as to a stranger and even kissing it, or, as in the case of a little girl (fifteen months old), offering it things and saying ‘Ta’ (sign of acceptance). In many cases curiosity prompts to an attempt to grasp the mirror-figure with the hand, to turn up the glass, or to put the hand behind it in order to see what is really there. This is very much like the behaviour of monkeys before a mirror, as described by Darwin and others. Little by little the child gets used to the reflexion, and then by noting certain agreements between his bodily self and the image, as the movement of his hands when he points, and partly, too, by a kind of inference of analogy from the doubling of other things by the mirror, he reaches the idea that the reflexion belongs to himself. By the sixtieth week Preyer’s boy had associated the name of his mother with her image, pointing to it when asked where she was. By the twenty-first month he did the same thing in the case of his own image.[53] ----- Footnote 53: See the very full account of the mirror experiment in Preyer’s book, p. 459 _seq._ ----- An infant will, we know, take a shadow to be a real object and try to touch it. Some children on noticing their own and other people’s shadows on the wall are afraid as at something uncanny. Here, too, in time the strange phenomenon is taken as a matter of course and referred to the sun. We are told that the phenomena of reflexions and shadows, along with those of dreams, had much to do with the development, in the early thought of the race, of the animistic conception that everything has a double nature and existence. Do children form similar ideas? We can see from the autobiography of George Sand how a clever girl, reflecting on the impressive experience of the echo, excogitates such a theory of her double existence; and we know, too, that the boy Hartley Coleridge distinguished among the ‘Hartleys’ a picture Hartley and a shadow Hartley. C.’s biography suggests that being photographed may appear to a child as a transmutation, if not a doubling, of the self. But much more needs to be known about these matters.