Morten St George Theory

[Morten St. George]

The only one that seems like it might be completely mythical is a specific version of lunaria (there are several lunarias, all of them real plants). The mythical lunaria is said to glow in the dark BUT even this MIGHT have been a real plant, perhaps one that is extinct. There is the possibility that there was a plant that had this capacity. There are aquatic plants and animals that have the capability to fluoresce. But, perhaps it was myth and it never existed.

In medieval mystic literature, the original book that held the VMS prophecies glowed in the dark, ie. emitted light. By chanting the names of God in the presence of this book, the mystics were able to increase its luminosity, so presumably the book could hear as well or, at least, was sensitive to sound. Due to its light-emitting qualities, the mystics assumed that the book was divine revelation written in heaven itself, black fire on white fire drawn from the primordial light of the universe.

But whether there is any connection between that and what you say here, I have no idea.