This has been well brought out by Professor Flournoy of Geneva in his volume _Des Phénomènes de Synopsie_ (audition colorée), chap. ii. ----- I may add that I once happened to overhear a little girl of six talking to herself about numbers in this wise: “Two is a dark number,” “forty is a white number”. I questioned her and found that the digits had each its distinctive colour; thus one was white; two, dark; three, white; four, dark; five, pink; and so on. Nine was pointed and dark, eleven dark green, showing that some of the digits were much more distinctly visualised than others. Just three years later I tested her again and found she still visualised the digits, but not quite in the same way. Thus although one and two were white and black and five pink as before, three was now grey, four was red, nine had lost its colour, and eleven oddly enough had turned from dark green to bright yellow. This case suggests that in early life new experiences and associations may modify the tint and shade of sounds. However this be, children’s coloured hearing is worth noting as the most striking example of the general tendency to overlay impressions of the senses with vivid images. It seems reasonable to suppose that coloured hearing and other allied phenomena, as the picturing of numbers, days of the week, etc., in a certain scheme or diagrammatic arrangement, when they show themselves after childhood are to be viewed as survivals of early fanciful brain-work. This fact taken along with the known vividness of the images in coloured hearing, which in certain cases approximate to sense-perceptions, seems to me to confirm the view here put forth that children’s imagination may alter the world of sense in ways which it is hard for our older and stiff-jointed minds to follow. I have confined myself here to what I have called the _play_ of imagination, the magic transmuting of things through the sheer liveliness and wanton activity of childish fancy. How strong, how vivid, how dominating such imaginative transformation may become will of course be seen in cases where violent feeling, especially fear, gives preternatural intensity to the mind’s realising power. But this will be better considered later on. This transformation of the actual surroundings is of course restrained in serious moments, and in intercourse with older and graver folk. There is, however, a region of child-life where it knows no check, where the impulse to deck out the shabby reality with what is bright and gay has all its own way. This region is Play. _Imagination and Play._