The Indian Mirror or A Brief History of Ancient and Modern India. From the age of Visvamitra ‘Rishi’ to our own times

On the north it is bounded by impassable ranges of the Himalaya and Karakoram mountains on the north-west by the mountains to the west of the Indus on the north-east by the hills of Assam and Cachar and everywhere else by the sea. [...] Those who moved towards the south-east crossed over the passes of the Hindu Kush into the valley of the Kabul river in Southern Afghanistan and thence into the country of the Indus. [...] Religious differenee then separated them ; the worshippers of the Devas or the Hindus remained in the Punjab the land of five rivers the worhippers of the' Asuras or the Iranians occupied Bactria the region of Balkh and Persia. [...] 9 The holy risi Visvamitta is the composer of the sacred Gayatri most celebrated of all the verses in the Rigveda the prayer of Brahmans. [...] the Kurus the Panchalas the Matsyas the Kosalas the Kasis and the Videhas.