He was not to be stimulated. Some letters - both his and hers - were confiscated for some timid expression of affection. So they wrote about literature, and used characters as codes. At Cambridge, they had passed each other by in the street. All those books, those happy or tragic couples they had never met to discuss! Tristan and Isolde, the Duke Orsino and Olivia (and Malvolio too), Troilus and Criseyde, Mr Knightley and Emma, Venus and Adonis. Turner and Tallis. Once, in despair, he referred to Prometheus, chained to a rock, his liver devoured daily by a vulture. Sometimes she was patient Griselde. Mention of a 'quiet corner in a library' was a code for sexual ecstasy.
Atonement, Ian McEwan