Iron knob hidden passage

Help! I can't get through the cracked wall where the plate you step on is, what is the trick to get through that and finish the dungeon? Thanks!

When you stepped on the plate, you set a wall hidden in the south. If you stand on the plate and face south, take fourteen steps south and you will see a passage that you opened by standing on that plate. Inside that passage is a lever puzzle that will open the wall with the crack on it, allowing you to finish that area.

Thanks Cat, let me give that a go!