Ed Moses: I mark therefore I am

Now 89, the artist – and former boyfriend of Marilyn Monroe – has been involved in many of the most influential art movements of the past 50 years, but his work proves the power of pencil on paperDecades ago, on a visit to the caves of La Salle in southern France, Ed Moses heard a voice from millennia past when he glimpsed the markings of early man. “He first discovered he existed by a blood print on a wall, or a footprint in the mud,” the 89-year-old artist says, sitting in the courtyar