Stimulating Substances

Exploration Stage: Octopus Citadel
From: Violet
Description: The substance used to numb the dog's sense of smell would have to be fresh. Look for something that the sender of the threatening letter may have used. How about freshly ground red pepper, for example? Check with me to see if there are any traces of red pepper around here!
Completed: This red pepper is in a very unusual mill. If I remember correctly, this mill belonged to Black when he worked here. That makes him our prime suspect. If Black is the one who sent those threatening letters, he's not going to get away with it.