There is a whole section to this that I cannot access.  When I opened 3 doors in 1604, I was able to enter 16105 but could only go down into a lit area where I can pull a few levers avoiding 2 large spiders. 

I can see that in 16105, which is unlit, that there is a lantern and other rooms which I cannot enter.  Can some one please give me a hint as to how I get the lantern.  It is clearly accessed from somewhere else but I have tried everywhere.

Two rooms up I was able to enter an unlit room from above (between 2 bouncing eyeballs but once I have navigated through 3 electrical currents - I couldn't go any further. 

Can someone give me a hint please before I go mad.  I've done all the rest of Mt. Peril and can see how to get into the vault but I presume the levers to let me through are also in this area.  HELP!!!!!!

In Room 15507 there's a sign that gives a hint about finding your way down to the basement. Look for red candles.

Isaw the sign and stupidly assumed it meant go through the doors.  I thought I had tried all the floor in this level - that's how I found the other one.  How stupid! I still only have 70% of the secrets and I can see from the scores that 100% is difficult.  Thanks a lot Semi-Native.

You're welcome, Skally.  ::)