＜p＞＜em＞Turning the envelope over, his hand trembling, Harry saw a purple wax seal bearing a coat of arms; a lion, an eagle, a badger and a snake surrounding a large letter 'H'.＜/em＞＜/p＞ ＜p＞Harry Potter has never even heard of Hogwarts when the letters start dropping on the doormat at number four, Pr...