During the 1993-1994 school year, Fred and George Weasley revealed and gave the map to Harry Potter so he could use a secret passage to get to Hogsmeade, since he didn't have a signed permission form, and Dementors were patrolling the boundaries. They said they acquired it from Argus Filch's Office during their first year at Hogwarts (the 1989-1990 school year). They demonstrated the map, showing seven secret passages leading to Hogsmeade, and which one was most likely known only by them. These 7 are: