But then it might be said, Let this be enough. Let us know by all means all that deserves to be known about our real spiritual ancestors in the great historical kingdoms of the world; let us be grateful for all we have inherited from Egyptians, Babylonians, Phoenicians, Jews, Greeks, Romans, and Saxons. But why bring in India? Why add a new burden to what every man has to bear already, before he can call himself fairly educated? What have we inherited from the dark dwellers on the Indus and the Ganges, that we should have to add their royal names and dates and deeds to the archives of our already overburdened memory? There is some justice in this complaint. The ancient inhabitants of India are not our intellectual ancestors in the same direct way as Jews, Greeks, Romans, and Saxons are; but they represent, nevertheless, a collateral branch of that family to which we belong by language, that is, by thought, and their historical records extend in some respects so far beyond all other records and have been preserved to us in such perfect and such legible documents, that we can learn from them lessons which we can learn nowhere else, and supply missing links in our intellectual ancestry far more important than that missing link (which we can well afford to miss), the link between Ape and Man. I am not speaking as yet of the literature of India as it is, but of something far more ancient, the language of India, or Sanskrit. No one supposes any longer that Sanskrit was the common source of Greek, Latin, and Anglo-Saxon. This used to be said, but it has long been shown that Sanskrit is only a collateral branch of the same stem from which spring Greek, Latin, and Anglo-Saxon; and not only these, but all the Teutonic, all the Celtic, all the Slavonic languages, nay, the languages of Persia and Armenia also. What, then, is it that gives to Sanskrit its claim on our attention, and its supreme importance in the eyes of the historian?