Secret Fire
Described by Philostratus (ca. 170–245 C.E.) in his Life of Apollonius
as issuing from a basin in a well on the hill Athanor. A
blue vapor was said to rise from the well and change into all the
colors of the rainbow. The bottom was strewn with red arsenic;
on it was the basin full of fire, and from it rose flame without
smell or smoke. Two stone reservoirs were beside it, one containing
rain, the other wind. This description is probably a symbolic
one.