Emizel had a point. Although wasn't it mostly a difference between the sharp, pointy symbol and the softer edges of the Dreameaters? Jack didn't have a Nightmare to look at so he couldn't be sure.

He shrugged and stood up, balancing on the table and standing over Emizel and Xion. "Maybe there will be something else in the other rooms to explain it. We're here to explore, right?" He was just as ready to move on as they were. "Well Xion I think we should check this library out next then. Is that upstairs?"