Shrugging Helena responded. "I don't know how old the oldest ghost is David since ghosts live for eternity. We will never pass over to the other side." Other side being death obviously. "Professor Binns feared death and that was why he chose to stay earthbound as a ghost for the whole of eternity just like me so I believe he is still out there in the world somewhere teaching history to kids but not at Hogwarts anymore." But honestly it was hard to know, it wasn't like she had kept in touch with Professor Binns.

"I must say that you surprise me David. You're mother showed that she was uncomfortable around ghosts every time we spoke while you on the other hand don't seem to mind my company and even seem to be intrigued by me." It was a mystery. It made Helena very curious.