A mansion that holds a mystery

Exploration Stage: Garden of Oblivion
From: Detective
Description: Somewhere in this shady place, I heard a man calling out to someone named Matilda or something. But I'm the one who's got to go first. Let's go find out who came to town this time, buddy.
Completed: It's not like someone is waiting for us, so we can take our time to check it out. Hmmm, the mansion didn't seem to have any storm damage, so maybe it really was the owner of the mansion who called the storm. Who on earth could it be?