Hi there!

Did you find the crack? If I'm not mistaken, I think you're looking for this one:
Re: Mansion help key for gate behind skeleton picture thanks
Postby Harlow on Tue Mar 03, 2009 10:51 pm
Spoiler: show
Let's start from the foyer (the room with the 3 doors when you first enter the Mansion). Once you get the key to it, enter the middle door. Go up the hallway, and you'll see side rooms to your left and right every few feet. One of the side rooms to the RIGHT has a wall with a slight crack in it (it's a NORTH wall). Go up to the crack, face it and press enter. Coryool will knock it down. Enter and it's full of spiders! Explore and kill the spiders and you will find the key to the room behind the skeleton picture! yay!

Hope this helps!
