"In the Mahabharata, the extent of Pragjyotisha was up to the Bay of Bengal in the south and to the Karatoya (which stretches from the Tista, the Koshi to the Mahanadi) in the west. The Kalika Purana mentions that the temple of Kamakhya near Guwahati was the centre point of Kamarupa. The Purana deals with the story of Kamarupa and Naraka. Naraka was born from the earth through its impregnation by Vishnu (in the Treta Yuga) and was brought up by Janaka, the king of Videha, in present-day north Bihar. He married the daughter of the king of Vidarbha. He came under the influence of Bana Asura and as a result became irreligious and presumptuous. Bana Asura ruled over Sonitpura and is believed to have built the Mahabhairava temple that contains a huge linga. Naraka was eventually slain by Vishnu in his incarnation as Krishna. In present-day North Guwahati, there now stands the temple of Aswaklanta, which means jaded horses. While invading Pragjyotisha to destroy Narakasura, Lord Krishna is said to have halted there, after his horses became tired, and a large number of small holes in the rocks near the river are believed to be the footprints of his horses. Bhagadatta, the son of Naraka and the successor Pragjyotisha, took part in the Mahabharata battle on the side of the Kauravas and died in the hands of Arjuna.5 The Vishnu Purana says that the country extended around the temple in all directions for 100 yojanas (about 450 miles). Its domain included the present-day territories of eastern Bengal, Assam and Bhutan. According to the Yogini Tantra, the king- dom of Kamarupa extended from the Karatoya river on the west to the Dikhou on the east, and from the mountains of Kanjagiri on the north to the confluence of Brahmaputra and Lakhya rivers on the south. It included the Brahmaputra valley, Bhutan, Rangpur, Cooch Behar, the north-east of Mymensingh and the Garo Hills."