In England, walking about at night was a crime for a very long time. William the Conqueror ordained that a bell should be rung at 8 p.m., at which point Londoners were supposed to put their fires and candles out and their heads down. Again and again, until modern times, Matthew Beaumont tells us, specifically nocturnal laws were promulgated against draw-latchets, roberdsmen, barraters, roysterers, roarers, harlots and other nefarious nightwalkers — including those ‘eavesdroppers’ who stood listening in the close darkness where the rain dripped from a house’s eaves.