18. To go back to the point under discussion. A pearl, or a glass bead, may owe its pleasantness in some degree to its lustre as well as to its roundness. But a mere and simple ball of unpolished stone is enough for sculpturesque value. You may have noticed that the quatrefoil used in the Ducal Palace of Venice owes its complete loveliness in distant effect to the finishing of its cusps. The extremity of the cusp is a mere ball of Istrian marble; and consider how subtle the faculty of sight must be, since it recognizes at any distance, and is gratified by, the mystery of the termination of cusp obtained by the gradated light on the ball.
In that Venetian tracery this simplest element of sculptured form is used sparingly, as the most precious that can be employed to finish the façade. But alike in our own, and the French, central Gothic, the ball-flower is lavished on every line—and in your St. Mary's spire, and the Salisbury spire, and the towers of Notre Dame of Paris, the rich pleasantness of decoration,—indeed, their so-called "decorated style,"—consists only in being daintily beset with stone balls. It is true the balls are modified into dim likeness of flowers; but do you trace the resemblance to the rose in their distant, which is their intended effect?
19. But farther, let the ball have motion; then the form it generates will be that of a cylinder. You have, perhaps, thought that pure Early English Architecture depended for its charm on visibility of construction. It depends for its charm altogether on the abstract harmony of groups of cylinders,[111] arbitrarily bent into mouldings, and arbitrarily associated as shafts, having no real relation to construction whatsoever, and a theoretical relation so subtle that none of us had seen it, till Professor Willis worked it out for us.
20. And now, proceeding to analysis of higher sculpture, you may have observed the importance I have attached to the porch of San Zenone, at Verona, by making it, among your standards, the first of the group which is to illustrate the system of sculpture and architecture founded on faith in a future life. That porch, fortunately represented in the photograph, from which Plate I. has been engraved, under a clear and pleasant light, furnishes you with examples of sculpture of every kind from the flattest incised bas-relief to solid statues, both in marble and bronze. And the two points I have been pressing upon you are conclusively exhibited here, namely,—(1). That sculpture is essentially the production of a pleasant bossiness or roundness of surface; (2) that the pleasantness of that bossy condition to the eye is irrespective of imitation on one side, and of structure on the other.
21. (1.) Sculpture is essentially the production of a pleasant bossiness or roundness of surface.
If you look from some distance at these two engravings of Greek coins, (place the book open so that you can see the opposite plate three or four yards off,) you will find the relief on each of them simplifies itself into a pearl-like portion of a sphere, with exquisitely gradated light on its surface. When you look at them nearer, you will see that each smaller portion into which they are divided—cheek, or brow, or leaf, or tress of hair—resolves itself also into a rounded or undulated surface, pleasant by gradation of light. Every several surface is delightful in itself, as a shell, or a tuft of rounded moss, or the bossy masses of distant forest would be. That these intricately modulated masses present some resemblance to a girl's face, such as the Syracusans imagined that of the water-goddess Arethusa, is entirely a secondary matter; the primary condition is that the masses shall be beautifully rounded, and disposed with due discretion and order.
Plate I.—Porch of San Zenone. Verona.
22. (2.) It is difficult for you, at first, to feel this order and beauty of surface, apart from the imitation. But you can see there is a pretty disposition of, and relation between, the projections of a fir-cone, though the studded spiral imitates nothing. Order exactly the same in kind, only much more complex; and an abstract beauty of surface rendered definite by increase and decline of light—(for every curve of surface has its own luminous law, and the light and shade on a parabolic solid differs, specifically, from that on an elliptical or spherical one)—it is the essential business of the sculptor to obtain; as it is the essential business of a painter to get good colour, whether he imitates anything or not. At a distance from the picture, or carving, where the things represented become absolutely unintelligible, we must yet be able to say, at a glance, "That is good painting, or good carving."