John Houston was the foremost expressionist landscape painter of his generation. He used colour in a direct, emotional way to engage with the subconscious. His great subject is the Forth Estuary, initially from the Fife side, often depicting the fields and birds rising from hedgerows above the sea, observed walking near his home in Buckhaven. And later, when his home was in Edinburgh, he painted north and east, from Gullane and North Berwick in all media, times of year and weather. The Bass Rock became a recurring motif, the great basalt plug once the home of prisoners, now just the home of gannets and kittiwakes. Like Mt. St. Victoire near Aix for Cézanne, Houston found limitless inspiration from this ever-changing locale, the subtlest pale of snow over water or, as here, the full drama of rock, sea and sunset.