"Blacked out like.... big black marker, you don't get to know this?"
Dean already knew a little bit about the gates. Bobby'd told him some things, and he still had his dad's journal. John Winchester had been out here years before, when Sam and Dean were still pretty small. He hadn't found anything much of note, but there were a few pages in the book about York.
"You keep saying 'what happened...'" Dean said. "What were you looking at? Old police reports? Stuff from the asylum?"