Dante, in the fifth canto of the Inferno, wandering among the souls of those damned for incontinence, meets the lovers, Paolo and Francesca. He is told that they fell from chastity after reading a book, the story of Lancelot. ‘Several times that reading urged our eyes to meet, and changed the colour of our faces; but one moment alone it was that overcame us. . . .’
Galeotto fu il libro, e chi lo scrisse;
quel giorno più non vi leggemmo avante.
‘The book, and he who wrote it was a Galeotto; that day we read in it no farther.’ And as the commentators tell us, for ‘Galeotto’ we may read ‘pandar’. Here we have what is, I think, a locus classicus for the problem under discussion: the meeting-place of behaviour and literature and morals; and an occasion for apprehension for both the moralist and the writer, though for very different reasons.