Note text 
Edit
This paper is covered in what appears to be mathematical calculations. An extremely precise and detailed sketch of the wall has been heavily annotated with measured angles, dimensions, and several lines of text in Qunlat. Whatever conclusions were drawn about the measurements are lost—the page has been ripped, seemingly by sharp teeth, and much of the remaining paper is hidden by a hardened layer of dried blood and dust from the cave-in.
Acquisition Edit
Found on a makeshift desk in the Grand Stairway in the Deep Roads (Trespasser).Note: It is not included in the Codex.
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