DM
The RA keys are on Level 7 (the last RA key is on this level), Level 9?? (cant
remember if its this one or 10) and Level 12.
Did the lever/pit have a chest on the pit before you pulled the lever? If so you need to get
downstairs and look in the chest for a clue.
I just solved DM this morning, the game went quite fast once I had the
firestaff. After I got the key from Level 12 (total of 3 keys), I went
back up to the firestaff level.