The reader taking a bird’s eye view of events since the picnic will have noted how various individuals on its outer circumference have somehow become involved in the spreading pattern: Mrs Valange, Reg Lumley, Monsieur Louis Montpelier, Minnie and Tom – all of whose lives have already been disrupted, sometimes violently. So too have the lives of innumerable lesser fry – spiders, mice, beetles – whose scuttlings, burrowings and terrified retreats are comparable, if on a smaller scale.