The Bierce Mystery

I have found all the stories to be truly interesting and chill-bump inducing. I have never read any of these stories, so far — I guess I'm a product of English teachers who didn't like to read outside the box.

I'm presenting about "The Moonlit Road," and its mystery really interests me. I have read about it online, but I was wondering what you guys thought about the second section: "Statement of Caspar Grattan." I've read a few ideas of who he is, and I have my own ideas, but I wondered what you thought.