Only conquering monarchs with whole nations as prisoners could have compassed such results. This, indeed, was one of the great objectives of war in these early times. It was the amassing of a great population for manual labour and the creation of new centres of civilization and trade. Thus it was that the peoples of Western Asia—Egyptians, Israelites, Jews, Phœnicians, Assyrians, Babylonians, and even Greeks—were transported over vast distances by land, and a movement given to the human race in that part of the world which has infinitely complicated the science of ethnology. The peopling of Canada by the French, of North America by the English, of Brazil by the Portuguese, of Argentina and Chile by Spaniards and Italians, is perhaps a more comprehensive process in the distribution of humanity and more permanent in its character. But ancient compulsory movement, if not as extensive as modern voluntary emigration, was at least wholesale, and it led to the distribution of people in districts which would not naturally have invited them. The first process in the consolidation of a district, or satrapy, was the settlement of inhabitants, sometimes in supercession of a displaced or annihilated people, sometimes as an ethnic variety to the possessors of the soil. Tiglath Pileser was the first Assyrian monarch to consolidate the Empire by its division into satrapies. Henceforward the outlying provinces of the dominions were convenient dumping places for such bodies of captives as were not required for public works at home.

Nothing would be more natural than that Sargon should deport a portion of the Israelitish nation to colonize his eastern possessions towards India, just as Darius Hystaspes later employed the same process to the same ends when he deported Greeks from the Lybian Barke to Baktria. There is nothing more astonishing in the fact that we should find a powerful people claiming descent from Israel in Northern Afghanistan than that we should find another people claiming a Greek origin in the Hindu Kush.

Nor was the importance of peopling waste lands and raising up new nations out of well-planted colonies overlooked ten centuries before Christ any more than it is now. Then it was a matter of transporting them overland and on foot to the farthest eastern limits of these great Asiatic empires. Always east or south they tramped, for nothing was known of the geography of the North and West. Eastwards lay the land of the sun, whence came the Indians who fought in the armies of Darius, and where gold and ivory, apes and peacocks were found to fill Phœnician ships. To-day it is different. The peopling of the world with whites is chiefly a Western process. Emigrants go out in ships, not as captives, but almost equally in compact bodies—the best of our working men to Canada, and many of the best of our much-wanted domestic servants to South Africa. It is a perpetual process in the world's economy, and perhaps the chief factor in the world's history; but in the old, old centuries before the Christian era it was necessarily a land process, and the geographical distribution of the land features determined the direction of the human tide. Some twenty years before the fall of Samaria and the deportation of the ten tribes of Israel, Tiglath Pileser had effected conquests in Asia which carried him so far east that he probably touched the Indus. Why he went no farther, or why Alexander subsequently left the greater part of the Indian peninsula unexplored, is fully explicable on natural grounds, even if other explanations were wanting.

The Indus valley would offer to the military explorers from the West the first taste of the quality of the climate of the India of the plains which they would encounter. The Indus valley in the hot weather would possess little climatic attraction for the Western highlander. Alexander's troops mutinied when they got far beyond the Indus. Any other troops would mutiny under such conditions as governed their outfit and their march. It is more than possible that the great Assyrian conqueror before him encountered much the same difficulty. It is clear, however, historically, that the Assyrian knew and trod the way to Northern Afghanistan (or Baktria), and if we examine the map of Asia with any care we shall see that there is no formidable barrier to the passing of large bodies of people from Nineveh to Herat (Aria), or from Herat to the Indus valley, until we reach the very gates of India on the north-west frontier. Four centuries later than Tiglath Pileser the battle of Arbela was fought to a finish between Alexander and Darius (who possessed both Greek and Indian troops in his army) on a field which is not so very far to the east of Nineveh, and which is probably represented more or less accurately by the modern Persian town of Erbil. The modern town may not be on the exact site of the action, and we know that the ancient town was some sixty miles away from the battlefield. However that may be, we learn that in the general retreat of the Persians which followed the battle, Darius made his way to Ecbatana, the ancient capital of the Medes. There he remained for about a year, but hearing of Alexander's advance from Persepolis in the spring of 330 B.C. he fled to the north-east, with a view to taking refuge with his kinsman Bessos, who was then satrap of Baktria. This gives us the clue to the general line of communication between Northern Mesopotamia and Baktria (or Afghanistan) in ancient days; and the twenty-five centuries which have rolled by since that early period have done little to modify that line.

Until the beginning of the nineteenth century A.D. from the earliest times with which we can come into contact through any human record, this high-road (not the only one, but the chief one) must have been trodden by the feet of thousands of weary pilgrims, captives, emigrants, merchants, or fighting men—an intermittent tide of humanity exceeding in volume any host known to modern days—bringing East into touch with the West to an extent which we can hardly appreciate. It may be said that the straightest road to Baktria did not lie through Ecbatana. It did not; but independently of the fact that Ecbatana was a city of great defensive capacity, and of reasons both political and military which would have impelled Darius to take that route, we shall find if we examine the latest Survey of India map of Western Persia that the geographical distribution of hill and valley make it the easiest, if not the shortest, route. The configuration of Western Persia, like that of Makran and Southern Baluchistan extending to our own north-west frontier, mainly consists of long lines of narrow ridges curving in lines parallel to the coast, rocky and mostly impassable to travellers crossing their difficult ridge and furrow formation transversely, but presenting curiously easy and open roads along the narrow lateral valleys. Ecbatana once stood where the modern Hamadan now stands. The road from Arbil (or Erbil) that carries most traffic follows this trough formation to Kermanshah and then bends north-eastward to Hamadan. From Hamadan to Rhagai and the Caspian gates, which was the route followed by Darius in his flight from Ecbatana, the road was clearly coincident with the present telegraph line to Tehran from Hamadan, which strikes into the great post route eastward to Mashad and Herat, one of the straightest and most uniformly level roads in all Asia. It must always have been so. Remarkable physical changes have occurred in Asia during these twenty-five centuries, but nothing to alter the relative disposition of mountain and plain in this part of Persia, or to change the general character of its ancient highway. All this part of Persia was under the dominion of the Assyrian king when the tribes of Israel left Syria for Armenia. He had but recently traversed the road to India, and he knew the richness of Baktria (of Afghan Turkistan and Badakshan) and could estimate what a colony might become in these eastern fields.

What more natural than that he should draft some of his captives eastward to the land of promise? There is not an important tribe of people in all that hinterland of India that has not been drafted in from somewhere. There is not a people left in India, for that matter, that can safely call themselves indigenous. From Persia and Media, from Aria and Skythia, from Greece and Arabia, from Syria and Mesopotamia they have come, and their coming can generally be traced historically, and their traditions of origin proved to be true. But there is one important people (of whom there is much more to be said) who call themselves Ben-i-Israel, who claim a descent from Kish, who have adopted a strange mixture of Mosaic law and Hindu ordinance in their moral code, who (some sections at least) keep a feast which strangely accords with the Passover, who hate the Yahudi (Jew) with a traditional hatred, and for whom no one has yet been able to suggest any other origin than the one they claim, and claim with determined force; and these people rule Afghanistan. It may be that they have justification for their traditions, even as others have; they may yet be proved to stand in the same relationship to the scattered remnants of Israel as some of the Kafir inhabitants of Northern Afghanistan can be shown to hold to the Greeks of pre-Alexandrian days. It is difficult to account for the name Afghan: it has been said that it is but the Armenian word Aghvan (Mountaineer). If this is so, it at once indicates a connection between the modern Afghan and the Syrian captives of Armenia.

But whilst "men in nations" were thus traversing the highlands of Persia from Mesopotamia to Northern Afghanistan by highways so ancient that they may be regarded almost as geographical fixtures as everlasting as the hills, we do not find much evidence of traffic with the Central Asian States north of the Oxus.

Early military excursions into the land of the Skyths were more for the purpose of dealing with the predatory habits of these warlike tribes, who afterwards peopled half of Europe as well as India, than of promoting either trade or geographical inquiry; and it was the route which led to Northern Afghanistan and Baktria through Northern Persia which was most attractive from its general accessibility and promise of profit. It was this way that Northern Kashmir and the gold-fields of Tibet were touched. The Indian gold which formed so large a part of the Persian revenues in the time of Darius undoubtedly came from Northern India and Tibet. Old as are the workings of the Wynaad gold-fields in the west, and Kolar in the east, of the peninsula, it is unlikely that either of these sources was known to Persia.

The more direct routes to India from Ecbatana, passing through Central Persia via Kashan, Yezd, and Kirman, terminated on the Helmund or in Makran, and there is no evidence that the mountain system which faces the Indus was ever crossed by invading Persian hosts. There was, indeed, a tradition in Alexander's time that an attempt had been made to traverse Makran and that it had failed. This, says Arrian, was one of the reasons why Alexander obstinately chose that route on his retirement from India. In spite, however, of the geographical difficulties which render it improbable that the hosts of Tiglath Pileser (who could have dealt with the Skythians of the north readily enough) ever broke across the north-western gateways of India's mountain borderland, there was undoubtedly a close connection between Assyria and India of which the evidence is still with us.

Throughout the golden age of the Second Empire of Assyria, after the subjugation of Babylon and the consolidation of the Empire by Tiglath Pileser, during the reigns of Sargon and Senacherib (who fought the first Assyrian naval fight), Esar Haddon (who destroyed Sidon and removed the inhabitants) and Assur-bani-pal (Sardanapalus), to the final overthrow of Assyria by Babylon in 625 B.C., when the star of Nebuchadnezzar arose on the southern horizon, Assyria held the supreme command of Eastern commerce, and Nineveh dictated the cannons of art to the world. No event more profoundly affected the commerce of Asia than the destruction of Sidon and the bodily transfer of its commercial inhabitants to Assyria. This was the age of Assyrian art, of literature, and of architecture; Assyrian culture realized its culminating point in the reign of Assur-bani-pal, when the library at Nineveh far surpassed any library that the world had ever seen. It was then that intercourse between Assyria and India became unbroken and intimate. Then public works of the largest dimensions were undertaken, and colonies formed for the purpose of developing the riches of the newly acquired lands in the East. Assyrian art found its way to India, and the affinity between Assyrian and Indian art is directly traceable still in spite of the impress subsequently effected by Greece and Rome.