Some of the phenomena in the Wastelands have been studied and understood; the effects of the weather and atmospheric pressure causing mirages—the sudden appearance of what seems to be an encampment, for example, flags flying from the tops of tents—or the spectral light of Valentin’s Fire. Other sightings challenge everything we know about nature. They force us to read the Wastelands as we would read a book in a lost language; a series of signs which we cannot hope to decipher.
The Cautious Traveller’s Guide to the Wastelands, page 55