This no doubt is fabulous, but it is hard to say how early communication with Gangetic India began.
On the east, in the Gangetic valley, Chandragupta (320-296 B.C.) firmly consolidated the dynasty which during the next century produced Asoka (264-228 or 227 B.C.), and established Buddhism throughout India.
The malarious tarsi fringing the Himalayas, the uninhabitable swamps of the Gangetic delta, and the wide jungles of the central plateau are at present the chief home of the tiger.
Fa-Hien entered India from Afghanistan, and journeyed down the whole Gangetic valley to the Bay of Bengal in A.D.
The fauna comprises most of the animals and birds common to the Gangetic plain; but the wild elephant is now practically unknown, except when a stray specimen loses its way at the foot of the hills.
With the last of these Pushyamitra Sunga waged successful war, driving him from the Gangetic valley and confining him to his conquests in the west.
The triangular tract between the Ganges and the Gogra and the boundary of Oudh is the most fertile corner of the Gangetic plain, and contains the densest population.
Separated from this chain by the valley of the Nerbudda on the west, and that of the Sone on the east, the plateau of Malwa and Baghelkhand occupies the space intervening between these valleys and the Gangetic plain.
Above the level of the Gangetic plains.
The chief centres of production are Bihar in Bengal, and the district of the United Provinces of Agra and Oudh lying along the Gangetic valley, and north of it, of which the produce is known as Bengal opium.