Does anyone else find it strange that Hermione just happened to know the formula for swearing allegiance by heart?
I agree with bogdanb. “Hermione knows X by heart” is usually equivalent to “Hermione saw X in a book”, and Hermione seeks out books.
I agree with bogdanb. “Hermione knows X by heart” is usually equivalent to “Hermione saw X in a book”, and Hermione seeks out books.