Hello darkness my old friend. The four-part “experiment in word, music and paintings” that was made by the BFI for the 1951 Festival of Britain did have more shade than light. But the mood in this episode is positively black. Thomas Nashe’s “In Time of Pestilence” is illustrated by Michael Ayrton, but star billing goes to Henry Moore who created some remarkable illustrations for Kathleen Raine’s The Pythoness.