In 1398 the wizard Zacharias Mumps set down the first lull description of the game of Quidditch. He began by emphasising the need for anti‑Muggle security while playing the game: 'Choose areas of deserted moorland far from Muggle habitations and make sure that you cannot be seen once you take off on your brooms. Muggle‑repelling charms are useful if you are setting up a permanent pitch. It is advisable, too, to play at night.

We deduce that Mumps's excellent advice was not always followed from the fact that the Wizards' Council outlawed all Quidditch‑playing within fifty miles of towns in 1362. Clearly the popularity of the game was increasing rapidly, for the Council found it necessary to amend the ban in 1368, making it illegal to play within a hundred miles of a town. In 1419, the Council issued the famously worded decree that Quidditch should not be played 'anywhere near any place where there is the slightest chance that a Muggle might be watching or we'll see how well you can play whilst chained to a dungeon wall'.

As every school‑age wizard knows, the fact that we fly on broomsticks is probably our worst‑kept secret. No Muggle illustration of a witch is complete without a broom and however ludicrous these drawings are (for none of the broomsticks depicted by Muggles could stay up in the air for a moment), they remind us that we were careless for too many centuries to be surprised that broomsticks and magic are inextricably linked in the Muggle mind.