Lost Item (слэш)

Severus has just finished his second year as Headmaster of Hogwarts, the first year without Voldemort. He is doing his paperwork, when suddenly a House-Elf appears in front of him, two days into the Summer Holidays.
He has to sort the lost and forgotten items of the students. Normally he would just push this work back, but because there are sometimes cases of lost pets (Trevor would be a good example) he has to do the work immediately.