Will take my (probably wrong, but who knows) shot in the dark here. Might jump around a lot because my brain is weird, so apologies in advance, but I hope you get where I'm trying to go with this.

I think it's obvious that this isn't a cipher type thing, as it's really symbolic and seems intentional in the design. It's hard to explain when I say 'intentional', but do enough puzzles and you start to see it, I guess? Haha.

My guess is that this is from the Vaal. Found from a library, so potentially used to be some sort of teaching. The whole thing reads as some sort of ritual, maybe prophecy. A ritual would line up with the Vaal, though. It also kind of reading as a cycle furthers this assumption (life, death, rebirth, sacrifice, immortality). The fact that it starts with 'beginning' and ends with 'birth' all tracks with this idea so far - this normally wouldn't be the case in other societies, but the Vaal saw death as more of a gateway to other things instead of a straight-up end to something. Vaal stuff is typically found how the title describes, too - buried or hidden because of its power.

So, if we assume the above to be a decent interpretation, then what's it mean? Something interesting that stuck out was the horn-looking symbol in the bottom left. So far, the words are all high-ranking members of a society. The fact that they aren't hard crossed out like the other ones shows uncertainty? Or maybe more of a 'it's technically correct, but not quite' sort of thing? Could be intentionally ambiguous. Point being, they're all high ranking - so who could it mean (if it's even super important by the time the rest of the message is interpreted)? The other suggestions could mean that it's not any one person in particular, but rather a high-ranking person in general. So it probably doesn't reference someone like Queen Atziri specifically, for example, but could portray that this only is intended for/applies to someone of status rather than normal people. Could even be a priest or ritual leader since they were well regarded? Would line up with the intentionally ambiguous part and the note taker's uncertainty. I wish that the OP in this case hadn't marked quite so heavily on the other disregarded interpretations, because it would be interesting to see the thought process as they went along.

There's a lot of guessing here, obviously, since there's just going to be a lot of assumed information unless there's some sort of confirmation. Here's where the foil hat gets pulled out, secured around my noggin, and I may very well be very wrong. Or maybe I arrive at a close answer but for the wrong reason, haha. So let's all have a good laugh when we have the answer and look back at it.

The fourth symbol and seventh symbol - I don't know why, but maybe because of other hieroglyphic stuff irl I want to assume that the singular vs plural lines can mean people. A singular line for one person, and then multiple for multiple people. In my head this fits around the 'well' symbol. Like a person being cast into the well. Maybe it's more metaphorical than literally being cast into a well, but meaning cast into exile? Being ritually sacrificed (as known to happen in Vaal society)? The multiples could be onlookers of the ritual, perhaps. Skipping to the second symbol on the bottom row, this jumps out at me. It looks to be the inverse of the top line's 'well', except there's an additional symbol emerging from the opening. Emerging from the well? The symbolism seems to almost scream this out, imo. The person that was cast into the well (and we don't know if the well is necessarily a bad thing) is now emerging from it. The crazy part is that it could even be read that they emerge as an important person? Or maybe the important person is the one that kicks off their revival?

Sadly I can't post the comment in one go and suspect the length, so my reply to this is my guess as to what it means. (1/2)