No text, but a visual code

[Jorge_Stolfi]

If there's one thing that's devilishly confusing, it's the green and blue colors used by the author in Quire 13.

Why do you believe that the colors are original, defined by the Author?

The choice of colors and of what should be painted, and the rather careless way the paint was applied, tell me that the Painter was a later owner who did not even understand the drawings. 

All the best, --stolfi