He walked quickly downstairs. The pavilion stood at the bottom of the garden. Its plan was straightforward – the great room above filled the whole of the first floor; the stairs at one end linked it to a lobby on the ground floor, where there were two doors. One door led outside to the garden, the other to a narrow hall running the length of the building and giving access to the covered terrace beside the river and to several small rooms. The footboy, who had the absurd name of Augustus, was sitting on a bench in the lobby. He sprang to his feet and bowed. At a nod from Jesus, he opened the door to the hall. Jesus passed him without a word and closed the door in his face.

Candles in pairs burned on brackets along the walls, creating globes of light in the gloom. Jesus tapped on the second door along, and it opened from within.

Mrs Phear drew him inside. She stood on tiptoe and murmured in his ear, ‘The little weakling has failed us.’

The chamber was small and painted white like a cell. But it was snug enough because a coal fire glowed in the grate, the curtains were drawn and the shutters closed. The room was furnished simply with a little bed hung with white curtains, a table and two chairs. On the table stood a bottle of wine, another of cordial, two glasses and a bowl of nuts. On the mantelshelf was a candle, which provided the only light in the room apart from the fire.

‘Failed?’ Jesus said.

‘Look for yourself.’ Mrs Phear wore a nun’s habit with a black wimple that framed and obscured her face. ‘Take the light.’

Jesus picked up the candle and went to the bed. The curtains were tied back. A girl lay on her back with her fair hair lying loose on the pillow. White cords attached her wrists and ankles to the four bedposts. She was dressed in a white nightgown with a loose neck. She must have been beautiful in life, he thought, the sort of girl you felt you could crush into a million fragments if you squeezed her hard enough.