She smelled of ambergris, roses, library dust, decayed paper, minium and printing ink, oak gall ink, and strychnine, which was being used to poison the library mice. The smell had little in common with an aphrodisiac. So it was all the stranger that it worked on him. ‘Don’t you believe,’ she said in a changed voice, ‘in sudden impulses? In unforeseen attractions? In the impacts of fireballs flying along collision trajectories? In cataclysms?’

