Board Thread:General Discussion/@comment-35615238-20190121141916/@comment-32182236-20190211153514

An addendum to the fact that they're ancient:

The glyphs also say that no human will fall, as there are no entrances or exits. If Chara fell, these glyphs would be proven wrong, and nobody would write them. This dates the glyphs to before Chara's fall, and thus, before Asriel's SOUL absorption. Thus, this must be a depiction of a monster who did this back when monsters were still on the Surface, before the war, as not a single human SOUL was absorbed during the war.