This is the forum for helping you out if you're stuck or if you want to discuss the nitty gritty details of the dungeons within Mount Grimrock. Warning: forum contains spoilers!
I didn't find any hints for level 8 here so there is a guide to get started.
SpoilerShow
Go get that note from second iron gate. Go back to the level 7. Then compare the map and note. You should see the similarities in the left middle of the map. This should get you started.
Could you perhaps explain in more detail exactly where this is? I'm playing oldschool mode and haven't really bothered mapping anything yet. I really don't feel like mapping level 7 which I've been through just to find the spot. Is it in the maze of shadows, after it, or in the beginning (or down a pit?) Cheers!
I was wondering if you happened to remember where you got the key for the locked door, with the keyhole within the center, located within the "Lightning Conduit" section of level 8. I've looked around the area with no luck. Thanks.