"What is more significant, a contemporary Chinese traveler reported that although Persian was understood by some in the court, the language in universal use there was Bengali. This points to the waning, although certainly not yet the disappearance, of the sort of cosmopolitan mentality that the Muslim ruling class in Bengal had exhibited since its arrival over two centuries earlier. It also points to the survival and eventual dominance of parochial Bengali culture at the highest level of official society." (Eaton 1993:60) Eaton, Richard M. (1993). The Rise of Islam and the Bengal Frontier, 1204–1760. University of California. ISBN978-0-520-20507-9. Retrieved 13 July 2017.