[P.O.E.]

IIRC didn’t HP Lovecraft ghost-write a story by Harry Houdini on the subject?

[Red Badger]

Yes..................

[Boogieman]

Yes, but that was about a secret tunnel under the Pyramid, while this is about tunnels inside the main body of the Pyramid. There is a tunnel under the pyramid down into the bedrock, but it’s been known about since forever.