I meant to write just one line before turning in, and rewrote it three times. The letter I finally sent read: Sleep well. That was it.

• PaulineCould I just see the bat fly off with a letter in its beak, just once?
  OsmonIt sleeps during the day. Even the bat belongs to this house's schedule.
• HabelThe wall by the mail tower's water channel is wet.
  AlbernHabel, twenty years running and you always steer the topic the same direction.