More or Less - Harry Potter: How many wizards live among us? - Harry Potter: How many wizards live among us? - BBC Sounds
More or Less - Harry Potter: How many wizards live among us? - Harry Potter: How many wizards live among us? - BBC Sounds
Harry Potter: How many wizards live among us?
Clues dropped by JK Rowling, the books and 'amenity ratios' help with the calculation
