Half concealed behind an airy planting a multiform abstract object of Yew and Box inspired by the sculptures of Henry Moore has been put up in Kaatje's Garden, depicting . . . . . what exactly? A many-headed monster? A flock of animals looking out to all sides to keep watch over their quietly grazing offspring? Or is it a group of people? Important people wearing top hats: the Sanhedrin, the high priests in session, surrounded by their slaves.