Horace Slughorn: [talking to Harry about his fish] It was a student who gave me Francis. One Spring afternoon I discovered a bowl on my desk, just a few inches of clear water in it. Floating on the surface was a flower petal. As I washed, it sank. Just when it reached the bottom, it transformed into a wee fish. It was beautiful magic, wondrous to the behold. The flower petal had come from a lily, your mother. The day I came downstairs, the day the bowl was empty, was the day your mother...