I've played lots but never before come across this monster vault in dreadfall.
I've cleared it out, but can't get into two rooms that I can see have equipment in them.
I've dug everywhere!
One room is to the left and one to the right of my current character:
(And yes, the WHOLE screen below is the vault - it took me two hours of play (to get rid of about 6 dreadmasters and 2 bosses inside!)
In case you're curious, I'm playing a Dwarf Doomed (http://te4.org/characters/2460/tome/f21 ... 62669be4fa
). I think the build is great and hope to get to the East after this.