Khác biệt giữa bản sửa đổi của “Muggles' Guide to Harry Potter/Magic/Sectumsempra”

Nothing in the books tells us who created this spell. It is true that Snape recorded it in his textbook, but we don't know whether he learned it from someone else (for instance Voldemort), or originated it himself. Internal evidence in the series suggests, weakly, that Snape recorded what someone else had told him.