I have a guess: That the markings on both sides of this figure means black. It is a feeling I have after much experience with looking at all the rongorongo texts. More exactly defined: I guess that if such markings are located on only one side, then it means red, if such markings are located on both sides it means black.

One of my key methods is to explicitly define my ideas. A bad map may be corrected. There is no possibility of drawing a good map at once.

2c	3c	5c
7	8	8

The glyphs in 3c and 5c belong together, they are both 8 and they have a similar shape.