There was a time when the Kosi and the Mahananda joined the Karatoya and formed a sort of ethnic boundary between people living south of it and the Kochs and Kiratas living north of the river.
Kirata | Kirata Kingdom |
The Pundra land appears to have been bounded on the east by the river Kasataya, on the west by the modern Mahananda, which separates it from Anga, on the south by the modern Padma, and on the north by the hills, which were inhabited by aboriginal hill tribes, such as the Kiratas.