>>15531716We don't understand it because we don't understand their symbols. What I can infer though is that they were counting something with the tallies. This leads me to think of something celestial based, most likey the moon, a star, or constellation. The rest of the creatures could be their own unique asterisms. The zodiac wasn't a thing back then, obviously.
That's my thoughts on it. Most of this mysterioua ancient stuff can be attributed to celestial observation.