The ravine was filled over time with blown in and precipitated snowfall. At the depth they were found, the overburden was considerable. I have a tough time contemplating Lyuda being injured and leaning against the ledge for breath while Zolo is trying to write something on a notepad. I would think he would make an attempt at rescue.
Zolo was supposedly found with a notebook and pencil in hand. It must have taken some effort to remove one or both, frozen as they were. The fact that the notebook was not conserved is significant to me. Did it actually exist? At an inquest, wouldn't the question come up whether there were any deathbed messages written? I'd expect the notebook to be produced in evidence then and there with the explanation about the chain of custody.
I think it unlikely that Zolo's notebook was actually something else, like some piece of frozen cloth. No. I also think it unlikely that someone in authority would deliberately make up a phony story about finding and trying to read the notebook. I do think it possible that the notebook still exists somewhere, for what it is worth, perhaps in a shoebox of mementos. Too, if the notebook existed, then Zolo would be holding it, frozen as it was, above and out of running water when found.
I think Zolo, hurt and helpless for himself and others, got as far as getting the notebook and pencil in hand before the cold paralyzed him and put him to sleep.
He thinks," I'll tell the world what happened here, but I can not bring pencil to paper, but they will see I died trying."