On the next room is a puzzle. Look around. The front part of the
room has three holes in it. What you need to do is to put three
large stones in each hole. Now, first things first. Examine the
back of the stones. When I say BACK, I mean the side AWAY from the
holes. After reading the last stone (the one saying something about
the "unseen"), go to wall on the [right] near the corner and examine
the wall. It should say something about "4 steps south, 10 steps
west." DO THAT FIRST. When doing the 4 steps, walk continuously,
meaning, BIG STEPS, not the small ones. You can do big steps by not
letting go of the directional buttons. After doing 4 steps, turn
/SOUTH\ and do 10 BIG steps. Yes, you will hit the wall on probably
your 7th or 8th step but keep on walking until you reach 10 steps.
Precisely 4 and 10 steps are needed. Nothing more, nothing less.
You will know that what you did was right when a stone fall from
the ceiling. DO NOT MOVE that stone yet. Go to the standing stones
(the three pillars) and go to the [left] one, the stone that says
something about looking at the back of the stone. Do that the
AFTER the the 4 steps, 10 steps. After examining the back of the
stone, a second stone will fall down. DO NOT MOVE that stone.
The stone that fell is at the back of the second stone. If you
notice, that stone is a stepping stone so that you can go up the
second stone pillar. Go up, be careful not to push the stone. When
you're at the top of the stone pillar, jump up and a third stone
will fall down. Now, look at the fallen stones. They are aligned
with the holes. Push the stones to their CORRESPONDING holes. If
you did it right, the ground will shake and a very short sequence
follows. If you did wrong, nothing will happen. You don't have to
reset the game, just step out of the room and go back in again. The
stone will be gone. And you can start solving the puzzle again.

Das habe ich aus einem Walkthrough kopiert.