A Rite from the stars-"Courage path" help/stuck

Is anyone playing this game? So far, it is pretty fun, but I'm stuck. There are 3 paths that must be completed in this "coming of age" game. (Courage, wisdom and spirit.) You can play them in any order. I chose wisdom first. After a few tests, I came to a door that requires a new special key. Before this post, I did consult a walkthrough which directed me to locate a "Piece of the volcano" in the 3rd panel of the "civilopedia" mural to use on the door. Any help in locating this illusive bit of volcano would be hugely appreciated.

I'm playing the game, gaily, but I haven't done wisdom yet. I've found things to be very cleverly hidden in this game so far. Sorry I can't help right now!

Were you using the walkthrough from here?

There also appears to be a couple of YouTube video walkthroughs about the Path of Wisdom.

thanks Draclvr, I'm on hold until I figure it out.

Yes, Marian, that's the one I am using. I've looked through some of the you tube videos, but I haven't found the wisdom path, only the courage path. The way they are labeled (e.g.part 1 and 2) is lame when the game is divided into 3 paths... sigh.

This is what I found on YouTube. I don't know if that would help you, though.

Thank you, Marian,for your help.

I hope you can get unstuck in the game.