You bring out your diagrams and ask some further questions. You can tell the arcanist would like to finish up with you, but upon seeing the diagrams, reconsiders and begins examining them more closely.
After about a half-hour of examining them and getting some of the story from you, mostly about where they were being used, there are some conclusions to be drawn.
-It's not obvious how these are to be used. Some of the diagrams seem to be for long-distance direction, or providing fixed or relative locations of objects. It would make some sense to be using trees for this, as trees stay in fixed locations to each other, but odd to be using living objects.
-Fire is somhow involved. Directing fire energy around is a pain and is rife with dissolution.. storing fire energy for any length of time longer than an hour or so is nearly impossible. If you want to use it, you need to make a fire and direct it into the object, and then use it right away.
You are warned about the spirits, though, because spirits don't see things the same way as people do. If they get bored with you, they might make you do strange and bizarre things, that can be harmful to your well-being. You are encouraged to maintain touchstones, that is, people who can direct you if your behavior changes, as what seems perfectly normal to you might be extremely bizarre to someone who knows you well.