Why was this ghost here? Sure she lived in the Astronomy tower or whatever, but why was she interrupting their lesson? Olly supposed he didn't mind. He was fine with the lesson going off course a bit, especially since there were a few interesting developments here. First of all that Flamsteed had a tattoo? Was that true? He looked at Dot, who had asked the question, and then at the ghost, who answered, and finally at Flamsteed, who apparently had a tattoo. Olly peered closely at him for at least a minute. He did not seem like the tattoo having type.

He did not so much appreciate when the ghost asked them a question. He had been hoping the lesson might be derailed by her presence but apparently not. They were just going to learn as usual. Though talking about gravity was fine because at least he understood that. Except...he peered at the ghost and how gravity was obviously not acting on her seeing as she was able to float. He raised his hand.

"Why doesn't gravity work on ghosts?" Wasn't it a law?