The old man was never seen again. The quiet foreigners who had rented a certain quiet house for one quiet month had been innocent Dutchmen or Danes. It was but an optical trick. There is no green door, but only a grey one, which no human strenght can burst open. I have vainly searched through admirable encyclopedias: there is no philosopher called Pierre Labime.

Vladimir Nabokov, "The Assistant Producer" in Nabokov's Dozen