Harry lived with the Dursleys for six months then little over a year with his godfather when Sirius gets an invitation from Dumbledore to take over Professor Binns' classes.
Takes Place: 0 - Pre Hogwarts (before Harry is 11)
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Snape flavour: None
Tags: Adoption
Categories: Teacher Snape > Professor Snape, Misc > Keepers of the Snitch