Who said this quote: "no nation has less right to be called pure than the irish"?

It was James Joyce who wrote in “Ireland, Island of Saints and Sages”, 1907, in Critical Writings, 1966, p.165-66, that "‘Our civilisation is a vast fabric, in which the most diverse elements are mingled, in whic hnordic aggressiveness and Roman law, the new bourgeois conventions and the remnant of a Syriac religion are reconciled. In such a fabric, it is useless to look for a thread that may have remained pure and virgin and without having undergone the influence of a neighbouring thread. What race, or what language (if we except [165] the few whom a playful will seems to have preserved in ice, like the people of Iceland) can boast of being pure today? And no race has less right to utter such a boast than the race now living in Ireland."