They could have used things like trees, people, animals, mountains, etc as a reference/starting point for their work.
A mistake involving the misunderstanding or incorrect application of law with regard to an act or transaction. The defense of mistake of law raises two issues. The first issue occurs where, because of a mistake of law, the defendant did not have the requisite intent to commit a crime.
If it’s the right hand spaces are FACE (f, a, c, e) from bottom to the top. The line notes are every good boy deserves fudge (e, g, b, d, f,) from bottom to top