Sherlock Holmes versus Arsene Lupin Hints

Who does Lupin's final letter refer to?

  • 1 of 4: Someone close by.
  • 2 of 4: There is only one person in this room.
  • 3 of 4: Go and speak to him, and it will all become clear.
  • 4 of 4: Speak to Barncow.