"Look, I love ghost stories, and I grew up in a house that was purported to have ghosts in it," O'Reilly says. "And when I was a kid, I thought it was haunted, too. Then I turned 11.
"It's too bad, because if ghosts were out there, it would be such fun."
As we finish one last sweep of the grounds before heading off to explore what used to be a Civil War hospital, Mosbaugh and I check the side of a building adjacent to the sanitarium. At first glance, the façade looks just like the others: There are some broken windows that I'm not going anywhere near, much of the white paint has flaked off, and the graffiti is creepy, if largely unintelligible. But I look closer -- and that's when my pulse quickens.
In heavy black lettering, distinctive in its childish script, a single word stretches across several other long-faded messages.
It says, "Boo."
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