Of Course, There’s A Secret Safe In The Secret Room

“At this point, I am a little shocked, and a little scared,” Jerry wrote. Curiosity got the better of him and he climbed through the small hole. The first thing he noticed in the tiny room were the gun casings stacked on top of one another. They were empty but plentiful. Why hoard empty casings?
That’s when he noticed something in the corner of the room. A Sentry safe, heavy and completely locked.