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 rejoined him at the entrance to the Persian Gulf. In the course of this six-year tour he fought battles, received the submission of many strange peoples, and founded cities. He saw the dead body of Darius in June, 330 B.C.; he returned to Susa in 324 B.C. He found the empire in disorder: the provincial satraps raising armies of their own, Bactria and Media in insurrection, and Olympias making government impossible in Macedonia. Harpalus, the royal treasurer, had bolted with all that was portable of the royal treasure, and was making his way, bribing as he went, towards Greece. Some of the Harpalus money is said to have reached Demosthenes.

But before we deal with the closing chapter of the story of Alexander, let us say a word or so about these northern regions into which he wandered. It is evident that from the Danube region right across South Russia, right across the country to the north of the Caspian, right across the country to the east of the Caspian, as far as the mountain masses of the Pamir Plateau and eastward into the Tarim basin of Eastern Turkestan, there spread then a series of similar barbaric tribes and peoples all at about the same stage of culture, and for the most part Aryan in their language and possibly Nordic in their race. They had few cities, mostly they were nomadic; at times they settled temporarily to cultivate the land. They were certainly already mingling in Central Asia with Mongolian tribes, but the Mongolian tribes were not then prevalent there.

An immense process of drying up and elevation has been going on in these parts of the world during the last ten thousand years. Ten thousand years ago there was probably a continuous water barrier between the basin of the Obi and the Aral-Caspian sea. As this had dried up and the marshy land had become steppe-like country, Nordic nomads from the west and Mongolian nomads from the east had met and mixed, and the riding horse had come back into the western world. It is evident this great stretch of country was becoming a region of accumulation for these barbaric peoples. They were very loosely attached to the lands they occupied. They lived in tents and wagons rather than houses. A brief cycle of plentiful and healthy years, or a cessation of tribal warfare under some strong ruler, would lead to considerable