"“A better case for the early linguistic and ethnic history of South Asia can be made by investigating the names of rivers. In Europe river-names were found to reflect the languages spoken before the influx of Indo-European speaking populations. They are thus older than c. 4500-2500 BC (depending on the date of the spread of Indo-European languages in various parts of Europe). It would be fascinating to gain a similar vantage point for the prehistory of South Asia.” (p 104-5)"