178. There remains yet a point of mechanical treatment on which I have not yet touched at all; nor that the least important,--namely, the actual method and style of handling. A great sculptor uses his tool exactly as a painter his pencil, and you may recognize the decision of his thought, and glow of his temper, no less in the workmanship than the design. The modern system of modeling the work in clay, getting it into form by machinery, and by the hands of subordinates, and touching it at last, if indeed the (so-called) sculptor touch it at all, only to correct their inefficiencies, renders the production of good work in marble a physical impossibility. The first result of it is that the sculptor thinks in clay instead of marble, and loses his instinctive sense of the proper treatment of a brittle substance. The second is that neither he nor the public recognize the touch of the chisel as expressive of personal feeling of power, and that nothing is looked for except mechanical polish. 179. The perfectly simple piece of Greek relief represented in Plate XIII., will enable you to understand at once,--examination of the original, at your leisure, will prevent you, I trust, from ever forgetting,--what is meant by the virtue of handling in sculpture. The projection of the heads of the four horses, one behind the other, is certainly not more, altogether, than three-quarters of an inch from the flat ground, and the one in front does not in reality project more than the one behind it, yet, by mere drawing,[35] you see the sculptor has got them to appear to recede in due order, and by the soft rounding of the flesh surfaces, and modulation of the veins, he has taken away all look of flatness from the necks. He has drawn the eyes and nostrils with dark incision, careful as the finest touches of a painter's pencil: and then, at last, when he comes to the manes, he has let fly hand and chisel with their full force; and where a base workman, (above all, if he had modeled the thing in clay first,) would have lost himself in laborious imitation of hair, the Greek has struck the tresses out with angular incisions, deep driven, every one in appointed place and deliberate curve, yet flowing so free under his noble hand that you cannot alter, without harm, the bending of any single ridge, nor contract, nor extend, a point of them. And if you will look back to Plate IX. you will see the difference between this sharp incision, used to express horse-hair, and the soft incision with intervening rounded ridge, used to express the hair of Apollo Chrysocomes; and, beneath, the obliquely ridged incision used to express the plumes of his swan; in both these cases the handling being much more slow, because the engraving is in metal; but the structural importance of incision, as the means of effect, never lost sight of. Finally, here are two actual examples of the work in marble of the two great schools of the world;