In my late 20s, I lived round the corner from the Barbican when it was the temporary home of the RSC. I saw lots of Shakespeare, and my appreciation of the plays was absolutely transformed by the discovery of this modest little book. My eyes were opened to the magical reality of Shakespeare’s world. Lings’ book led me to others, including CS Lewis’s Studies in Medieval and Renaissance Literature. These books suggested to me, as a chemist, that artists’ materials could be examined in the light of contemporary world views (the four elements, alchemy, astrology etc) to throw light on pre-modern visual culture, in the same way that Lings and Lewis threw light on pre-modern literature.