Obviously total speculation but the illustrations and chosen subjects there make me wonder if the document(s) might be Druidic of some sort, since "ancient Drui

Obviously total speculation but the illustrations and chosen subjects there make me wonder if the document(s) might be Druidic of some sort, since "ancient Druids considered it profane to record their teachings in writing": https://llewellyn.com/encyclopedia/article/186 https://llewellyn.com/encyclopedia/article/186 My impression of intense focus on oral tradition isn't that such groups had no form of writing but as something analogous to modern-day Sensitive Compartmentalized Information systems to prevent anyone in the out-group from learning in-group knowledge, like how the US government has "UNCLASSIFIED / CLASSIFIED / SECRET / TOP-SECRET / TOP-SECRET-COSMIC" etc. It would be hard to describe the exact physical properties of things like plants, animals, and space without writing and illustrating them, so maybe these are documents from one such group who didn't want the fruit of their scientific studies to proliferate?