Assam is in many ways a country of exceptional interest. Hemmed in as India is, by the sea on the South-east and South-west, and by the lofty chain of the Himalayas on the North, the only routes between it and the rest of Asia which are practicable for migration on a large scale, lie on its North-West and North-east confines, the so-called Aryans, and many later invaders, such as the Greeks, the Huns, the Pathans, and the Mughals, entered India from the ...