This, then, was the state of our knowledge in the summer of 1879. We knew that the Hittites, with whom Hebrews and Egyptians and Assyrians had once been in contact, possessed a hieroglyphic system of writing, and that this system of writing was found on monuments in Hamath, Aleppo, Carchemish, and Lykaonia. We knew, too, that in Lykaonia it accompanied figures carved out of the rock in a peculiar style of art, and represented as wearing a peculiar kind of dress. [Illustration: SLABS WITH HITTITE SCULPTURES. (_Photographed in situ at Keller, near Aintab._)] Suddenly the truth flashed upon me. This peculiar style of art, this peculiar kind of dress, was the same as that which distinguished the sculptures of Karabel, of Ghiaur-kalessi, and of Kappadokia. In all alike we had the same characteristic features, the same head-dresses and shoes, the same tunics, the same clumsy massiveness of design and characteristic attitude. The figures carved upon the rocks of Karabel and Kappadokia must be memorials of Hittite art. The clue to their origin and history was at last discovered; the birthplace of the strange art which had produced them was made manifest. A little further research made the fact doubly sure. The photographs Professor Perrot had taken of the monuments of Boghaz Keui in Kappadokia included one of an inscription in ten or eleven lines. The characters of this inscription were worn and almost illegible, but not only were they in relief, like the characters of all other Hittite inscriptions known at the time, among them two or three hieroglyphs stood out clearly, which were identical with those on the stones of Hamath and Carchemish. All that was needed to complete the verification of my discovery was to visit the Pass of Karabel, and see whether the hieroglyphs Texier and others had found there likewise belonged to the Hittite script. More than three hours did I spend in the niche wherein the figure is carved which Herodotos believed was a likeness of the Egyptian Sesostris. It was necessary to take 'squeezes' as well as copies, if I would recover the characters of the inscription and ascertain their exact forms. My joy was great at finding that they were Hittite, and that the conclusion I had arrived at in my study at home was confirmed by the monument itself. The Sesostris of Herodotos turned out to be, not the great Pharaoh who contended with the Hittites of Kadesh, but a symbol of the far-reaching power and influence of his mighty opponents. Hittite art and Hittite writing, if not the Hittite name, were proved to have been known from the banks of the Euphrates to the shores of the Ægean Sea.