Negatives of a performance at the Museum of Modern Art, Oxford, 1979 Eleven strips of black and white negatives of a performance with Paul Burwell during a Jackson Pollock exhibition at the Museum of Modern Art, Oxford, 6 May 1979. The negatives were originally held in a glassine storage pocket marked ‘Heindorff’ in an unidentified hand. The images were taken by Michael Heinforff at various stages of the performance. 6 May 1979