Two and a half miles from Rhayader, in Wales, is a 1,558 foot hill called Gamallt. It can also be thought of as a mountain. Using the author's encounter with Gamallt, this story, written in the form of a meditation, explores some of the ways in which philosophical and scientific ideas about perception and reality have led to thought-provoking ideas about what can be said to be real. It also seeks to loosen the apparent incompatibility of fantasy and...