Cas laughed and let Harry climb off of him, watching as he ran over to his toys. With Harry happily playing by himself he summoned a book and decided to read. He wasn’t sure what he wanted to do for a job now. He liked the idea of gaining a Mastery and Hogwarts had a brilliant Mastery program, but not for History of Magic and that was what he really wanted to do. Binns’ lessons were painfully boring and more often than not put students to sleep, he was sure he could teach History of Magic in a much more fun and engaging way, but so few British witches and wizards bothered to gain a Mastery in it, it was going to be hard to find someone to apprentice under. He had time though and he knew some foreign wizards offered a Mastery via correspondence for certain branches and fortunately History of Magic happened to be one of those branches.