A little over 350 years ago, on the night between Saturday 1 and Sunday 2 September 1666, Thomas Farynor, well-known baker, lay in bed in his home above his bakery. Maybe he was staring at the ceiling, worrying, as he did every night, as to whether he had completely put out the fire in his ovens. Or maybe he was just asleep. It had, after all, been a long day.