In the BMJ (subscription required), Dalrymple presents Le Horla, Guy de Maupassant’s creepy-sounding story of a haunted man.
The someone who possesses him is a superior being brought about by evolution (Maupassant had also read Darwin): “A new being! Why not? It must surely come. Why should we be the last? The new being will enslave man as man has enslaved the animals.” Is it not ironic to think of the brain of the author of this story being eaten away by an enemy that was invisible to him?