I saw a truly brilliant artwork last night. Cordelia Swann's Piece at Polytechnic at Raven Row. The sounds of Charlie Mingus' I X Love hit me when I entered the room. The music was the accompaniment to two photo projectors doing a slide show, taking turns to create fresh juxtapositions of images. 'The Mysteries of Berlin' (1979-82) was all about the Cold War, the dark truth within images, the rise of Communism. I spotted a still from Ashes and Diamonds. It was a bit like in Antonioni's Blow Up when David Hemmings keeps blowing up a photograph to look at a more intense detail and spot a murder. A kind of dialogue-less film. Basically its bloody great.