“In 2002 Mandela attempted to record his feelings about Robben Island in [five] limited edition, individually signed prints. … This week, London’s Belgravia Gallery opens an exhibition of Mandela’s lithographs – against his wishes. He ‘strongly dissociates himself’ from the event; his lawyer insists, ‘He did not sign those artworks.’ The gallery claims its video of him signing artworks proves its sale authentic.”