No text, but a visual code

[HermesRevived]

It could be as you say Hermes. I think the first thing is to identify the symbols that represent each of the glyphs in the script. It is not easy, but I am inclined to believe that the gallows are an ideogram of the Sun. In fact, they are the only glyphs that stand out and in each string of symbols there is only one gallows.

As I see it, the two-legged gallows represent the Sun during the day and at night. The arrow indicates the day. The one-legged gallows represent the Sun at the lunar nodes, the head and tail of the dragon in terms of medieval astronomy.

I agree that is what we must endeavour to work out. I also agree the gallows set are solar, but I see them as representing the solstices and equinoxes. I am proposing a different but very similar notation to what you propose. In my account, the primal glyph is [o] (omicron) which represents the Sun, one solar day, there being 360 in a cycle. This cycle is interrupted by the solstices. 

But let us keep working at it. The main thing, as you insist, is to let go of linguistic assumptions and expectations and tackle the 'text' as a system of astrological notation. It is still devilishly difficult to work out, but I am sure we are on the right track at least.