Investigating an old mystery

Date: 10/27/2022

I am a journalist or historian investigating an old ( 75 year) mystery. It’s a story of a man who sold fireworks or explosives to towns across the US for a celebration. Something bad happened, but it’s only ever hinted at. It’s a complex story. I am in a large library (??) working with a woman who is a researcher or journalist. I visit a tree that is the site of a massacre of indigenous people. The tree is huge and embedded with skulls and mushrooms. It oozes a sticky slime. I find detailed notes about the original explosion mystery. The notes are in my own handwriting and voice recordings are in my voice. I had already investigated the case but have no memory of it. It’s very sinister. I fall into the tapes when I hear them. At one point I am in a stone valley with stairs leading down. There is some unknowable god controlling the situation. It continues like this. I keep falling into the mystery, without control. It’s scary. I can’t remember all the details.