Where do I find the Moonstone? [F,T]

Hint 1 of 11:

Look in each of the rooms in the ruins.

Hint 2 of 11:

There is a helpful diagram showing a bull's horns, tail, and head.

Hint 3 of 11:

Once you find the horns and head, you'll be in good shape.

Hint 4 of 11:

Look near the bull's horns to find them.

Hint 5 of 11:

You're going to have to look for loose piles of stones.  PUSH them.

Hint 6 of 11:

It would be nice if you could draw lines on the ground as easily as you
can in a drawing.

Hint 7 of 11:

The transit (cross the bridge at the start of the ruins) will help.