Languages, however, may change and perish, but the races that have spoken them remain. The characteristics of race, once acquired, are slow to alter. Though the last echoes of Hittite speech have died away centuries ago, the Hittite race still inhabits the region from which in ancient days it poured down upon the cities of the south. We may still see in it all the lineaments of the warriors of Karabel or the sculptured princes of Carchemish; even the snow-shoe and fingerless glove are still worn on the cold uplands of Kappadokia. CHAPTER VIII. HITTITE TRADE AND INDUSTRY. The Hittites shone as much in the arts of peace as in the arts of war. The very fact that they invented a system of writing speaks highly for their intellectual capacities. It has been granted to but few among the races of mankind to devise means of communicating their thoughts otherwise than by words; most of the nations of the world have been content to borrow from others not only the written characters they use but even the conception of writing itself. We know from the ruins of Boghaz Keui and Eyuk that the Hittites were no mean architects. They understood thoroughly the art of fortification; the great moat outside the walls of Boghaz Keui, with its sides of slippery stone, is a masterpiece in this respect, like the fortified citadels within the city, to which the besieged could retire when the outer wall was captured. The well-cut blocks and sculptured slabs of which their palaces were built prove how well they knew the art of quarrying and fashioning stone. The mines of the Bulgar Dagh are an equally clear indication of their skill in mining and metallurgic work. The metallurgic fame of the Khalybes, who bordered on the Hittite territory, and may have belonged to the same race, was spread through the Greek world. They had the reputation of first discovering how to harden iron into steel. It was from them, at all events, that the Greeks acquired the art. Silver and copper appear, from the evidence of the Egyptian and Assyrian monuments, to have been the metals most in request, though gold and iron also figure among the objects which the Hittites offered in tribute. The gold and copper were moulded into cups and images of animals, and the copper was changed into bronze by being mixed with tin. From whence the tin was procured we have yet to learn. Silver and iron were alike used as a medium of exchange. The Assyrian king received from Carchemish 250 talents of iron; and the excavations of Dr. Schliemann among the ruins of Troy have afforded evidence that silver also was employed by the Hittites in place of money, and that its use for this purpose was communicated by them to the most distant nations of Western Asia Minor.