Cracked walls provide the inspiration for Prison Wall Abstract (A Man Escaped). This set of 12 photographic prints depicts the perimeter wall of Pentonville Prison in London. The damaged surface of the wall had been repaired by workmen with white filler in gestural patterns worthy of any abstract expressionist painter. Parker photographed the marks literally seconds before they were obliterated forever by a layer of magnolia paint. Later that day, after the paint was barely dry, a prisoner (incarcerated for a shot gun murder) escaped after scaling the walls.