Grimrock

Here's why i had so much trouble! That picture isn't accurate, there are straight lines when they should be bent on the bottom of it

I have no idea! I've already been down to level 11 and if i picke dup a note it's mixed in with all the rest

I am on level 8, however I have no access to anything except the northernmost part of the level. There are three doors that I can see: I see an Iron gate with a nearby wall-text saying "vault of the dismantler;" there's a swith on the wall on the other side but I can't find any way in. I s...