" He was searching his memory when suddenly a strange figure appeared in front of them, on horseback, trotted for a moment, then turned round in the saddle. His blood froze; he remained rooted to the spot in horror. That equivocal, sexless face was green, with terrible eyes of an icy light blue beneath purple lids; postules encircled its mouth; extraordinarily thin arms, bare from the elbows down and shaking with fever, emerged from ragged sleeves, and the fleshless thighs shivered in high boots which were far too large.
The dreadful gaze was fixed on Des Esseintes, boring into him, chilling him to the marrow, while the bulldog woman, now in even greater panic, clung to him with her head thrown back on her rigid neck, screaming blue murder. And instantly he grasped the meaning of the horrifying vision. He was looking at the figure of the Pox. "

― Joris-Karl Huysmans , Against Nature (À Rebours)