Could someone tell me how I leave this area the first time through? I can't leave by the Ladder of Miles, as I don't have a gas mask yet. And apparently I'm also not ready to leave by walking over the hot coals. So I'm not sure where that leaves me. I've climbed the rock tower and thrown the lever, which causes part of the tower to turn. But I still can't figure out how to leave. Thanks for any suggestions!

Tom