An envelope is mixed in with the mail with old paper and a wax seal of the Demon's Head from the League. Breaking the seal the letter reads as such:
Detective,
It has been brought to our attention that you have an item from October that was taken from a sovereign nation. Out of respect from the past dealings you have had with us, you are given this one chance to give the item to us in a sign of good faith. You have one week to give us your answer.