Harriet rubbed her hands together. It really was cold in here. But that wasn't the Professor's fault. She was a ghost, and so probably couldn't feel the temperature. So how was she supposed to know how cold it was. But they could have bluebell flames! At least it was good then. They could stay warm. Though Hattie didn't really know that charm yet. But she smiled when she saw that Charlotte was offering to do them. How kind of her. "Can I have one please Charlotte?" Because why not? The girl was offering.

Now back to the Professor's question. Hattie actually had no clue who the guy was. Not at all. But she could try to guess what he had done in Astronomy. A guess was better than nothing after all. Raising her hand she smiled. "I don't know who he is..." Honesty is the best policy right? "But did he like name a star... or come up with some important Theory?"