"In my computation, however, sufficient historical evidence has been set forth for any demographic behaviour and on that basis I have arrived at the conclusion that the population of India in A.D. 1000 was about 200 million and in the year 1500 it was 170 million.... The loss of Indian population during Mahmud of Ghaznavi's invasions was about 2 million as studied in some detail in Appendix A of the Growth of Muslim Population in Medieval India."