"When the [Rig Vedic] hymns were written the focus of Āryan culture was the region between the Jamnā (Sanskrit Yamunā) and Satlaj (Shutudrī), south of the modern Ambālā, and along the upper course of the river Sarasvatī. The latter river is now an insignificant stream, losing itself in the desert of Rajasthan, but it then [in Rig Vedic times] flowed broad and strong..."