Grimrock

I have tried putting it on and off, off and on and then switching torches.
You never know, might need to try fire and torched out soon.

I found it, because I'm the god damn Secret Hunter. I only found two secrets yet, and one of them was obligatory to proceed. So I don't know what the poster above me is talking about, I am sure I didn't miss anything and I haven't had secrets in the past 4 halls.

And by crack in the wall, I mean loose rock.

I have seen the small crack on rock wall one, but are there more kinds of secrets? Should I be looking out for more or is looking for cracks in the wall enough?