of Chitral, it continues with a sweep right into Central Afghanistan and merges into the mountain chain which reaches to Herat. From this point, north of Chitral, commences the true north-west barrier of India, a barrier which includes nearly the whole width of Afghanistan beyond the formidable wall of the trans-Indus mountains. It is here that the gates of India are to be found, and it is with this outermost region of India, and what lies beyond it, that this book is chiefly concerned.

As the history of India under British occupation grew and expanded and the painting red process gradually developed, whilst men were ever reaching north-westward with their eyes set on these frontier hills, the countries which lay beyond came to be regarded as the "ultima thule" of Indian exploration, and Afghanistan and Baluchistan were reckoned in English as the hinterland of India, only to be reached by the efforts of English adventurers from the plains of the peninsula. And that is the way in which those countries are still regarded. It is Afghanistan in its relations to India, political, commercial, or strategic, as the case may be, that fills the minds of our soldiers and statesmen of to-day; and the way to Afghanistan is still by the way of ships—across the ocean first, and then by climbing upward from the plains of India to the continental plateau land of Asia. It was not so twenty-five centuries ago. One can imagine the laughter that would echo through the courts and palaces of Nineveh at the idea of reaching Afghanistan by a sea route! Think of Tiglath Pilesur, the founder of the Second Assyrian Empire, seated, curled, and anointed, surrounded by his Court and flanked by the sculptured art of his period (already losing some of the freshness and vigour of First Empire design) in the pillared halls of Nineveh, and counting the value of his Eastern satrapies in Sagartia, Ariana, and Arachosia, with outlying provinces in Northern India, whilst meditating yet further conquests to add to his almost illimitable Empire! No shadow of Babylon had stretched northward then. No premonition of a yet larger and later Empire overshadowed him or his successors, Shalmaneser and Sargon. Northern Afghanistan was to these Assyrian kings the dumping ground of unconsidered companies of conquered slaves, a bourne from whence no captive was ever likely to return. No record is left of the passing of those bands of colonists from West to East. We can only gather from the writings of subsequent historians in classical times that for centuries they must have drifted eastward from Syria, Armenia, and Greece, carrying with them the rudiments of the arts and industries of the land they had left for ever, and providing India with the germs of an art system entirely imitative in design, colour, and relief. The Aryan was before them in India. Already the foundations were laid for historic dynasties, and Rajput families were dating their origin from the sun and moon, whilst somewhere from beneath the shadow of the Himalayas in the foothills of Nipal was soon to arise the daystar of a new faith, a "light of Asia" for all centuries to come.

It is impossible to set a limit to the number and variety of the people who, in these early centuries, either migrated, or were deported, from West to East through Persia to Northern Afghanistan, or who drifted southwards into Baluchistan. Not until the ethnography of these frontier lands of India is exhaustively studied shall we be able to unravel the influence of Assyrian, Median, Persian, Arab, or Greek migrations in the strange conglomeration of humanity which peoples those countries. Baktra (Balkh), in Northern Afghanistan, must have been a city of consequence in days when Nineveh was young. Farah, a city of Arachosia in Western Afghanistan on the borders of Seistan, must have been a centre from whence Assyrian arts and industries were passed on to India for ages; for Farah lies directly on the route which connects Seistan with the southern passes into the Indus valley. The Indus itself seems to have been the boundary which limited the efforts of migration and exploration. Beyond the Indus were deserts in the south and wide unproductive plains of the Punjab in the north, and it is the deserts of the world's geography which, far more than any other feature, have always determined the extent of the human tidal waves and influenced their direction. They are as the promontories and capes of the world's land perimeter to the tides of the ocean. Beyond these parched and waterless tracts, where now the maximum temperatures of sun-heat in India are registered, were vague uncertainties and mythical wonders, the tales of which in ancient literature are in strange contrast to the exact information which was obtained of geographical conditions and tribal distributions in the basins of the Kabul or Swat rivers, or within the narrow valleys of Makran.

A recent writer (Mr. Ellsworth Huntington) has expressed in picturesque and convincing language the nature of the relationship which has ever existed between man and his physical environments in Asia, and has illustrated the effect of certain pulsations of climate in the movement of Asiatic history. The changing conditions of the climate of High Asia, periods of desiccation and deprivation of natural water-supply alternating with periods of cold and rainfall, acting in slow progression through centuries and never ceasing in their operation, have set "men in nations" moving over the face of that continent since the beginning of time, and left a legacy of buried history, to be unearthed by explorers of the type of Stein, such as will eventually give us the key to many important problems in race distribution. But more important even than climatic influence is the direct influence of physical geography, the actual shaping of mountain and valley, as a factor in directing the footsteps of early migration. Nowadays men cross the seas in thousands from continent to continent, but in the days of Egyptian and Assyrian empire it was that straight high-road which crossed the fewest passes and tapped the best natural resources of wood and water which was absolutely the determining factor in the direction of the great human processions; and although change of climate may have set the nomadic peoples of High Asia moving with a purpose more extensive than an annual search for pasturage, and have led to the peopling of India with successive nations of Central Asiatic origin, it was the knowledge that by certain routes between Mesopotamia and Northern Afghanistan lay no inhospitable desert, and no impassable mountain barrier, that determined the intermittent flow from the west, which received fresh impulse with every conquest achieved, with every band of captives available for colonizing distant satrapies. To put it shortly, there was an easy high-road from Mesopotamia through Persia to Northern Afghanistan, or even to Seistan, and not a very difficult one to Makran; and so it came about that migratory movements, either compulsory or voluntary, continued through centuries, ever extending their scope till checked by the deserts of the Indian frontier or the highlands of the Pamirs and Tibet, or the cold wild wastes of Siberia.

Thus Afghanistan and Baluchistan, the countries with which we are more immediately concerned, were probably far better known to Assyrian and Persian kings than they were to the British Intelligence Office (or its equivalent) of a century ago. The first landward explorations of these countries are lost in pre-historic mists, but we find that the first scientific mission of which we have any record (that which was led by Alexander the Great) was well supplied with fairly accurate geographical information regarding the main route to be followed and