§ XXV. It was above stated, that the principal difference in general form and treatment between the Byzantine and Gothic palaces was the contraction of the marble facing into the narrow spaces between the windows, leaving large fields of brick wall perfectly bare. The reason for this appears to have been, that the Gothic builders were no longer satisfied with the faint and delicate hues of the veined marble; they wished for some more forcible and piquant mode of decoration, corresponding more completely with the gradually advancing splendor of chivalric costume and heraldic device. What I have said above of the simple habits of life of the thirteenth century, in no wise refers either to costumes of state, or of military service; and any illumination of the thirteenth and early fourteenth centuries (the great period being, it seems to me, from 1250 to 1350), while it shows a peculiar majesty and simplicity in the fall of the robes (often worn over the chain armor), indicates, at the same time, an exquisite brilliancy of color and power of design in the hems and borders, as well as in the armorial bearings with which they are charged; and while, as we have seen, a peculiar simplicity is found also in the _forms_ of the architecture, corresponding to that of the folds of the robes, its _colors_ were constantly increasing in brilliancy and decision, corresponding to those of the quartering of the shield, and of the embroidery of the mantle. § XXVI. Whether, indeed, derived from the quarterings of the knights' shields, or from what other source, I know not; but there is one magnificent attribute of the coloring of the late twelfth, the whole thirteenth, and the early fourteenth century, which I do not find definitely in any previous work, nor afterwards in general art, though constantly, and necessarily, in that of great colorists, namely, the union of one color with another by reciprocal interference: that is to say, if a mass of red is to be set beside a mass of blue, a piece of the red will be carried into the blue, and a piece of the blue carried into the red; sometimes in nearly equal portions, as in a shield divided into four quarters, of which the uppermost on one side will be of the same color as the lowermost on the other; sometimes in smaller fragments, but, in the periods above named, always definitely and grandly, though in a thousand various ways. And I call it a magnificent principle, for it is an eternal and universal one, not in art only,[4] but in human life. It is the great principle of Brotherhood, not by equality, nor by likeness, but by giving and receiving; the souls that are unlike, and the nations that are unlike, and the natures that are unlike, being bound into one noble whole by each receiving something from, and of, the others' gifts and the others' glory. I have not space to follow out this thought,--it is of infinite extent and application,--but I note it for