A few years ago I wrote to Chris Marker about Staring Back, a book and exhibition of his photographs. Many of the two hundred images, made across half a century, were of political protest: from demonstrations against the Algerian and Vietnam wars to marches in response to the electoral success of the National Front in 2002 and the liberalisation of French labour laws in 2006. I was hoping – rather against hope, given his well known attitude to publicity – for an interview on the subject of his portraits of protesters, maybe even a meeting at his legendarily crammed studio in Paris. A reply came back within minutes; Marker was simply too busy: ‘crushed under my present grind’. He was happy to reminisce by email about his visits to Ireland, but if I needed a thread through his imagery I would have to unspool it myself.