things, how much space, in proportion to the gigantic dimensions of the figure, they would leave covered. From another point of view he is equally concerned to reproduce for us from the sketches, or other evidence[192] we possess from antiquity, a drawing of the seated figure of Zeus, and, most of all, the great chair with its rich decorations of bas-reliefs, and by so doing to give us in every respect some conception of the splendour and perfection of the work. In the Middle Ages ivory is mainly used for smaller works of very varied character, such as Christ on the Cross and the Virgin Mary, or yet again for drinking vessels with scenes of hunting and the like, in which cases ivory, on account of its smoothness and hardness, is in many respects preferable to wood. (_β_) The material which was most favoured and most widely employed by the ancients was bronze, in the casting of which it attained a success of the highest mastery. Preeminently during the period of Myron and Polycletus it was the prevailing material utilized in statues of deities and other kinds of sculpture. The darker, less defined colour, the sheen, the smoothness of bronze generally, has not reached the abstract formality of the white marble, and it is at the same time warmed. The bronze which the ancients used was partly gold and silver, partly copper, varying considerably in the degrees of its component parts. The so-called bronze of Corinth is, for example, a composition unique of its kind which originated after the burning of Corinth from the almost incredible wealth of this city in statues and vessels of bronze. Mummius had many statues carried off on his ships; and the excellent man was so full of anxiety for their safe deliverance in Rome that he informed the captain that in case of loss he must recreate the same exactly or suffer, such was the threat, heavy punishment. In the founding of bronze the ancients attained an incredible mastery, by aid of which it was possible to them to cast it securely despite its extreme thinness. It is possible to regard such a feat as merely a matter of technical dexterity which is unconnected with true art. Every artist, however, works upon a certain material, and it is an essential quality of genius to be complete master of the same. Dexterity and adaptability in matters which concern the technique and instruments of its work constitute one distinct aspect of genius. On account of this virtuosity in the founder's art a work of sculpture in this medium involved a less expensive process, and was in the reach of a larger number than the chiselling out of marble statues. A second advantage, which the ancients were able to attain in casting their work in bronze, was the purity thereby acquired, which they carried so far that their bronze statues did not require further enchasening, and consequently lost nothing of the finer marks of expression, which is almost inevitable where such a process is necessary. If we consider, then, the