Although the proofs of there having been a Stone age in Western Europe are absolutely convincing, it is difficult to feel equally sure with regard to the portions of the globe where so many districts are closed to the explorer. Everywhere, however, where excavations have been made, they have yielded the most remarkable results. M. de Ujfalvy has brought diorite and serpentine hatchets and wedges from the south of Siberia, and Count Ouvaroff tells us of a Quaternary deposit, the only one known at present at Irkutsk, in Eastern Siberia, containing cut flints. Near Tobolsk, Poliaskoff found some beautifully worked stones. Other archæologists tell us of having found, in the east of the Ural Mountains and on the shores of the Joswa, hammers, hatchets, pestles, nuclei the shape of polygonal prisms, and round or long pieces of flint, all pierced with a central hole, which are supposed to have been spindle whorls. Lastly, Klementz tells us that the lofty valleys of the Yenesei and its tributaries were inhabited in the most remote times by races who developed a special civilization. At the other extremity of the great Asiatic continent, a deposit of cinders found at the entrance of a cave near the Nahr el Kelb yielded some flint knives or scrapers, and more recently a prehistoric station has been made out at Hanoweh, a little village of Lebanon, east of Tyre. The flints are of primitive shapes, not unlike the most ancient forms found in France. They were discovered in a mass of _débris_ of all kinds, forming a very hard conglomerate. Some teeth, which had belonged to animals of the bovidæ, cervidæ, and equidæ groups, were got out with considerable difficulty, but the bones in the conglomerate were too touch broken up to be identified. Worked flints and arrow- or spear-heads were also found in considerable quantities in various parts of the table-land of Sinai, and at the openings of the caves in which the ancient inhabitants took refuge. It was with stone tools that these people worked the mines riddling the sides of the mountains, and it is still easy to make out traces of their operations. We have already alluded to Japan; for a long time the barbarian Aïnos, the earliest inhabitants of the country, were acquainted with nothing but stone. Flint arrows were presented to the Emperor Wu-Wang eleven hundred years before our era; the annals of one of the ancient dynasties speak of flint weapons, and an encyclopædia published in the reign of the Emperor Kang-Hi speaks of rock hatchets, some black and some green, and all alike dating from the most remote antiquity.