Sorry, but I don't think you're understanding what everyone is telling you (or I'm really misunderstanding...)

All you need to do is:
  • Take them out of the letter
  • Delete the now empty letter
  • Go to any armoire (any inn room has one)
  • Put them in the armoire
  • Never see them ever again, unless you go to the armoire.
Or have I missed something? :S