Researcher's Introduction.

"Man is least himself when he talks in his own person. Give him a mask, and he will tell you the truth" — Oscar Wilde

"What is essential is invisible to the eye" — Antoine De Saint-Exupery

"But, how do you *know* it happened like that?" — Reader

Due of the seamless nature of `Underground' this is a reasonable question to ask, although hints can be found at the back of the book in the Bibliography and Endnotes. The simple …

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