198. Thus the "Crossing the Brook," and such other elaborate and large compositions, are actually painted in nothing but gray, brown, and blue, with a point or two of severe local color in the figures; but in the minor drawings, tender passages of complicated color occur not unfrequently in easy places; and even before the year 1800 he begins to introduce it with evident joyfulness and longing in his rude and simple studies, just as a child, if it could be supposed to govern itself by a fully developed intellect, would cautiously, but with infinite pleasure, add now and then a tiny dish of fruit or other dangerous luxury to the simple order of its daily fare. Thus, in the foregrounds of his most severe drawings, we not unfrequently find him indulging in the luxury of a peacock; and it is impossible to express the joyfulness with which he seems to design its graceful form, and deepen with soft penciling the bloom of its blue, after he has worked through the stern detail of his almost colorless drawing. A rainbow is another of his most frequently permitted indulgences; and we find him very early allowing the edges of his evening clouds to be touched with soft rose-color or gold; while, whenever the hues of nature in anywise fall into his system, and can be caught without a dangerous departure from it, he instantly throws his whole soul into the faithful rendering of them. Thus the usual brown tones of his foreground become warmed into sudden vigor, and are varied and enhanced with indescribable delight, when he finds himself by the shore of a moorland stream, where they truly express the stain of its golden rocks, and the darkness of its clear, Cairngorm-like pools, and the usual serenity of his aerial blue is enriched into the softness and depth of the sapphire, when it can deepen the distant slumber of some Highland lake, or temper the gloomy shadows of the evening upon its hills.