Quote Originally Posted by Throknor View Post
While I'm can see it being something like thyme or rosemary or some indigenous herb, I think a strong pepper would be a bit of a giveaway. Especially if it is only in front of one door. "I don't smell any dwarves, just some strong spices in front of a single door that is in no way suspicious."
Belkar probably sprinkled them in front of several doors, if that powder wasn't some kind of magic dust that removes tracks or something.

Actually I think there's an item for that but I forget what it's called. Don't think it's a Core item though.