[SPOILER]Ep1 Plot Summary

[242]

And then there are two messages more than that Thaliur.

The employment list and the message from a subordinate to the high caste.

/Breaker

More than that. I suppose majority of 1990-2001 notes are notes of the cult members (for instance 3 notes of "spider's lover", he was a member of cult expedition too as I understood).

All notes can be divided on 5 major periods:
First - preWW2 period, old iron mine
Second - WW2 period, military base
Third - postWW2 period up to 1954, old iron mine again, was closed in 1954.
Fourth - 1956-1972, 'new', rebuilt iron mine, some catastrophe occured in 1972 and 40 something workers vanished, bodies not found, mine was closed. Perhaps it was just explosion (see note), perhaps something much more frighteful occured after explosion with survived workers as no bodies were found.
Fifth - around 1990 - 2001, cult expedition period. According to note of "spider's lover" the same cataclism that occured about 30 years ago (1972) and because of which they (cult expedition) arrived, occured again in 2001 just when Philip arrived to the mine.