Unexpected Discovery

Exploration Stage: Burned-out Estate
From: Mr. Black
Description: No, I do not believe in coincidences. So I am leaning toward the most horrifying speculation. It could be that a serial arsonist is deceiving the people of the city and making up unscientific fictions to avoid arousing suspicion. Find something that can be used to set the mansion on fire.
Completed: Ah, there you are! Thank you for finding the matches! The careful owner of this mansion would not have matches, so this means that an outsider brought them in. This box also has a symbol in the shape of a flame... it must belong to the arsonist! He must have been in a hurry and left it behind!