"The chronological limits assigned to the Shtra and Brahmana periods will seem to most Sanskrit scholars too narrow rather than too wide, and if we assign but 200 years to the Mantra period, from 800 to 1000 b.c., and an equal number to the Ohhandas period, from 1000 to 1200 B.O., we can do so only under the supposition that during the early periods of history the growth of the human mind was more luxuriant than in later times, and that the layers of thought were formed less slowly in the primary than in the tertiary ages of the world."