I meant to write just one line before turning in, and rewrote it three times. What I finally sent read: Sleep well. Four words.

• PaulineCould I just see the bat fly off with the letter in its beak, just once?
  OsmonIt sleeps during the day. Even the bat is a member of this household.
• HabelThe mail tower wall by the water channel is wet.
  AlbernHavel has twenty years of unerring accuracy at steering the subject.