In 1978…
"The masterpiece of a map was confiscated in Sirius, James, Remus and Peter's final year and none of them were able to steal it back from a well prepared and suspicious Filch. In any case, their priorities changed in their final months at school, becoming far more serious and focused on the world beyond Hogwarts, where Lord Voldemort was successfully rising to power. All four map's creators would shortly be inducted into the renegade organization headed by Albus Dumbledore, the Order of the Phoenix, and a map of their old school – no matter how ingenious – would no longer be of use to them except as a piece of nostalgia."
-J.K Rowling
