Born in the 18th century, Corot lived into the age of Manet and the impressionists. His fascination has to do with this sense of existing out of time, between worlds. This late painting by him is magically archaic. It creates a greenish, silverish pastoral dreamscape where nothing happens – give or take some wood being gathered. Yet in the stillness he suggests so much. There are even hints of the photographic age in the way the trees are silhouetted against the sleepy light. Corot is ultimately a storyteller: he conjures here a lonely, ghostly atmosphere in which you might encounter doubles or revenants. He is a quiet yet spookily great artist.