After the latin alphabet, after the greek alphabet, I’m using more esoteric symbols to create little works with filigrees.
And I stopped using wallnut stain to do the whole work with my home made ferro-gallic ink.
One of the symbols used for arsenic in alchemical manuscripts :
And a stylized fleur de lys
As for the symbols shapes, I found my inspiration in the very good (even if too short) book by Rudolf Koch, The Book of Signs.