New Clues

Exploration Stage: Mansion by the Canal
From: Detective
Description: In the stash was a letter in a very thick paper envelope. Hey, find me a letter opener to open this envelope. According to the theory, the contents of the letter will allow us to follow the trail of the missing detective.
Completed: Thanks for helping me out! I needed the sharpest letter opener to open this envelope. But all I find inside are blank pages! Hmmm .... This is a new clue that leads to a detective who is obviously gone.