The introduction is a bit crazy. Anyway, I heard about this by way of a million neopagan text references but in fact the actual first time I heard of it was from Tori Amos's "Night of Hunters" when she wrote a song about the "Battle of Trees" set to the music of Erik Satie's "Gnossienne no. 1."
Night of Hunter is one of her less popular albums but the more I've listened, the more I've come to love it. She discusses that composition here: