155. Over all this vast field of human skill the lawe which I have enunciated to you rule with inevitable authority, embracing the greatest, and consenting to the humblest, exertion; strong to repress the ambition of nations, if fantastic and vain, but gentle to approve the efforts of children, made in accordance with the visible intention of the Maker of all flesh, and the Giver of all Intelligence. These laws, therefore, I now repeat, and beg of you to observe them as irrefragable.

1. That the work is to be with tools of men.

2. That it is to be in natural materials.

3. That it is to exhibit the virtues of those materials, and aim at no quality inconsistent with them.

4. That its temper is to be quiet and gentle, in harmony with common needs, and in consent to common intelligence.

We will now observe the bearing of these laws on the elementary conditions of the art at present under discussion.

156. There is, first, work in baked clay, which contracts as it dries, and is very easily frangible. Then you must put no work into it requiring niceness in dimension, nor any so elaborate that it would be a great loss if it were broken; but as the clay yields at once to the hand, and the sculptor can do anything with it he likes, it is a material for him to sketch with and play with,—to record his fancies in, before they escape him, and to express roughly, for people who can enjoy such sketches, what he has not

time to complete in marble. The clay, being ductile, lends itself to all softness of line; being easily frangible, it would be ridiculous to give it sharp edges, so that a blunt and massive rendering of graceful gesture will be its natu ral function: but as it can be pinched, or pulled, or thrust in a moment into projection which it would take hours of chiselling to get in stone, it will also properly be used for all fantastic and grotesque form, not involving sharp edges. Therefore, what is true of chalk and charcoal, for painters, is equally true of clay, for sculptors; they are all most precious materials for true masters, but tempt the false ones into fatal license; and to judge rightly of terra-cotta work is a far higher reach of skill in sculpture-criticism than to distinguish the merits of a finished statue.

157. We have, secondly, work in bronze, iron, gold, and other metals; in which the laws of structure are still more definite.

All kinds of twisted and wreathen work on every scale become delightful when wrought in ductile or tenacious metal; but metal which is to be hammered into form separates itself into two great divisions-solid, and flat.

(A.) In solid metal work, i. e., metal cast thick enough to resist bending, whether it be hollow or not, violent and various projection may be admitted, which would be offensive in marble; but no sharp edges, because it is difficult to produce them with the hammer. But since the permanence of the material justifies exquisiteness of workmanship, whatever delicate ornamentation can be wrought with

rounded surfaces may be advisedly introduced; and since the colour of bronze or any other metal is not so pleasantly representative of flesh as that of marble, a wise sculptor will depend less on flesh contour, and more on picturesque accessories, which, though they would be vulgar if attempted in stone, are rightly entertaining in bronze or silver. Verrochio's statue of Colleone at Venice, Cellini's Perseus at Florence, and Ghiberti's gates at Florence, are models of bronze treatment.

(B.) When metal is beaten thin, it becomes what is technically called "plate," (the flattened thing) and may be treated advisably in two ways: one, by beating it out into bosses, the other by cutting it into strips and ramifications. The vast schools of goldsmith's work and of iron decoration, founded on these two principles, have had the most powerful influences over general taste in all ages and countries. One of the simplest and most interesting elementary examples of the treatment of flat metal by cutting is the common branched iron bar, Fig. 8, used to close small apertures in countries possessing any good primitive style of ironwork, formed by alternate cuts on its sides, and the bending down of the severed portions. The ordinary domestic window balcony of Verona is formed by mere ribands of iron, bent into curves as studiously refined as those of a Greek vase, and decorated merely by their own terminations in spiral volutes.

All cast work in metal, unfinished by hand, is inadmissible in any school of living art, since it cannot possess

the perfection of form due to a permanent substance; and the continual sight of it is destructive of the faculty of taste: but metal stamped with precision, as in coins, is to sculpture what engraving is to painting.

Figure 8.

158. Thirdly. Stone-sculpture divides itself into three schools: one in very hard material; one in very soft, and one in that of centrally useful consistence.

A. The virtue of work in hard material is the expres sion of form in shallow relief, or in broad contours; deep cutting in hard material is inadmissible, and the art, at once pompous and trivial, of gem engraving, has been in the last degree destructive of the honour and service of sculpture.

B. The virtue of work in soft material is deep cutting,

with studiously graceful disposition of the masses of light and shade. The greater number of flamboyant churches of France are cut out of an adhesive chalk; and the fantasy of their latest decoration was, in great part, induced by the facility of obtaining contrast of black space, undercut, with white tracery easily left in sweeping and interwoven rods-the lavish use of wood in domestic architecture materially increasing the habit of delight in branched complexity of line. These points, however, I must reserve for illustration in my lectures on architecture. To-day, I shall limit myself to the illustration of elementary sculptural structure in the best material ; that is to say, in crystalline marble, neither soft enough to encourage the caprice of the workman, nor hard enough to resist his will.

159. C. By the true. "Providence" of Nature, the rock which is thus submissive has been in some places stained with the fairest colours, and in others blanched into the fairest absence of colour, that can be found to give harmony to inlaying, or dignity to form. The possession by the Greeks of their λeurós Xilos was indeed the first circumstance regulating the development of their art; it enabled them at once to express their passion for light by executing the faces, hands, and feet of their dark wooden statues in white marble, so that what we look upon only with pleasure for fineness of texture was to them an imitation of the luminous body of the deity shining from behind its dark robes; and ivory afterwards