The showman pitches up the coloured balls, and as they slowly cross one another we can trace their course and local tints perfectly, even while we are soothed with the harmony they produce all together. Red passes yellow, and an image of orange flashes in front of us, even while we see both red and yellow quite distinctly apart; red passes blue, and purple at once dashes between the blue and the red; yellow passes blue, and green is the result. Yellow, red, and blue are the primary colours; orange, purple, and green are the direct mixtures of the primary colours, or secondary tints. The showman gets animated, and the three balls are sent spinning rapidly from hand to hand: they seem all to be in the air at once, blending and dashing about each other until there is no red, or yellow, or blue, no distinct orange, purple, or green, but a thousand indefinite shafts and ripples of colour. Is it red, blue, green, orange, purple, yellow, or gems and sparkles of fire? They are only three, three that are a host, three that have become brown, grey, black, all sorts of browns, every description of that subtle and endless grey. Can the painter do any better than imitate the street showman with the three colours? Start fair, mix slowly and decidedly, get animated, and dash along, with his entire heart in his work, some thought in his head, and his eye steadfastly fixed on nature, and nature only, while his fingers run over the keyboard to the music she sets before him. He will not require to trouble himself about much else, for it will all come out of the mist in very good time, when he has learned the trick of keeping the three in unity and motion. The child, when he gets a paint-box, as a rule, begins quite right, although he does it unconsciously. He will paint his picture-book with a red face, yellow coat, and blue decorations. Most likely you will find him disdain all mixtures, except perhaps green, which impresses him as nice--no doubt from its association with the fields, where he likes to run about and play. The savage, with his tattooing and war-paints, does the same exactly, with the superior significance of his symbols: every twist of the ornament meaning a grade or a power, every streak a motive or a threat. His gods are reverenced only as the mementoes or symbols of the unseen or divine, not because they are stones or sticks, as we so often misunderstand heathenism. Old Egypt stands to-day, mighty monument of the grandeur of simplicity: with its solid works that defy time, its glaring colours that defy criticism. Assyria comes after, with her purples, her gold, and her greater refinements. 'White, green, and blue hangings, fastened with cords of fine linen and purple to silver rings and pillars of marble: the beds were of gold and silver, upon a pavement of red, and blue, and white, and black marble.'[7] [Illustration: AN ANCIENT EGYPTIAN CORRIDOR (_From a sepia sketch by the Author_)]