Another change to Hogwarts – and the other Harvest Hubs – was the screening that would be done to all members of staff. Because it was done so suddenly where there was no escaping it, it was discovered that Professor Quirinius Quirrell was harbouring the remaining fragments of Voldemort – and was immediately detained into a small something-by-something room with heavy locks, charms and more to prevent any and all chances of escaping down in the prison pits of the Fortress Nest of the Lilin.