XIV. Finally, work may be wasted by being too good for its material, or too fine to bear exposure; and this, generally a characteristic of late, especially of renaissance, work, is perhaps the worst fault of all. I do not know anything more painful or pitiful than the kind of ivory carving with which the Certosa of Pavia, and part of the Colleone sepulchral chapel at Bergamo, and other such buildings, are incrusted, of which it is not possible so much as to think without exhaustion; and a heavy sense of the misery it would be, to be forced to look at it at all. And this is not from the quantity of it, nor because it is bad work--much of it is inventive and able; but because it looks as if it were only fit to be put in inlaid cabinets and velveted caskets, and as if it could not bear one drifting shower or gnawing frost. We are afraid for it, anxious about it, and tormented by it; and we feel that a massy shaft and a bold shadow would be worth it all. Nevertheless, even in cases like these, much depends on the accomplishment of the great ends of decoration. If the ornament does its duty--if it _is_ ornament, and its points of shade and light tell in the general effect, we shall not be offended by finding that the sculptor in his fulness of fancy has chosen to give much more than these mere points of light, and has composed them of groups of figures. But if the ornament does not answer its purpose, if it have no distant, no truly decorative power; if generally seen it be a mere incrustation and meaningless roughness, we shall only be chagrined by finding when we look close, that the incrustation has cost years of labor and has millions of figures and histories in it and would be the better of being seen through a Stanhope lens. Hence the greatness of the northern Gothic as contrasted with the latest Italian. It reaches nearly the same extreme of detail; but it never loses sight of its architectural purpose, never fails in its decorative power; not a leaflet in it but speaks, and speaks far off, too; and so long as this be the case, there is no limit to the luxuriance in which such work may legitimately and nobly be bestowed. [Illustration: PLATE I.--(Page 33--Vol. V) ORNAMENTS FROM ROUEN, ST. LO, AND VENICE.]