The Geography of the Puranas c11.s6.26

c11.s6.26

(5) According to tradition the Son-Ken doāb was called the Karuṣadeśa Taking all the above indications into account, as well as the topography of the north-eastern slopes of the Vindhyas, we come to the conclusion that the Karūṣa janapada of the Purāṇas coincided with the northern slope of the Kaimur range and included within it the basin of the upper Tons river. Its southern boundary was therefore the Kaimur range, the western limit was the Ken and the eastern and northern boundary was demarcated by the scarps of the Vindhyas which face the Yamunā.