Two doors from one corner, on the left hand going east, the line was broken by the entry of a court; and just at that point, a certain sinister block of a building thrust forward its gable on the street. It was two storeys high; showed no window, nothing but a door on the lower storey and a blind forehead of discoloured wall on the upper; and bore in every feature the marks of a prolonged and sordid negligence. The door, which was equipped with neither bell nor knocker, was blistered and distained.

“Did you ever remark that door?” he asked; and when his companion had replied in the affirmative, “It is connected in my mind,” added he “with a very odd story.”

“Indeed!” said Mr Utterson, with a slight change of voice, “and what was that?”

– Robert Louis Stevenson, Dr Jekyll and Mr Hyde