An epiphany came over me as I studied the Krakow document. Initially I had ignored this scrawled form… it had too many strokes to be considered a valid Glyph.
Then it struck me. It could indeed be a Glyph, but crossed out as if to say 'NO!'
I do not yet know what it means, it covers every point on the calibration grid with spokes radiating out from the center.