“It does not do to dwell on the past....” Peeves read the inscription on the wall outside the Headmaster's office. Oh what hogwash that was, he sighed, rolling his eyes. Even Peeves knew that without the past, he would not know what mistakes were made and therefore could not correct them.

Like the major pranks of the past – done by him and other great minds, like the memorable portable swamp and fireworks by the Weasley twins. Those were awesome moments of the past, but can be improved upon by knowledge of them.

Knowledge of the past is vital . . .