A surgeon performs a small operation on a young woman's brain so that she may see the god Pan, and years later a series of London gentlemen begin killing themselves. Machen grew up among the Roman ruins of Gwent and never wrote about anything else, really; this novella was denounced as degenerate in 1894 and has been quietly feeding horror ever since - Stephen King calls it one of the best in the language. Sixty plates of nineteenth-century painting, from David Cox's landscapes to William Shayer's cattle and a House of Commons of 1878, give this tale of the unseen a visible world.