Dalgliesh had been pinned in a corner by Nora Gurney who had wanted to discuss the practicality of the theory she had developed: since every set of fingerprints was unique, could not the whole country be printed, the data stored on a computer and research carried out to discover whether certain combinations of lines and whorls were indicative of criminal tendencies? That way crime could be prevented rather than cured. Dalgliesh had pointed out that, since criminal tendencies were universal, to judge from the places where his fellow guests had parked their cars, the data would be unmanageable, apart from the logistical and ethical problems of mass fingerprinting and the discouraging fact that crime, even supposing the comparison with disease to be valid, was, like disease, easier to diagnose than to cure. It had almost been a relief when a formidable female novelist, vigorously corseted in a florid cretonne two-piece which made her look like a walking sofa, had borne him off to pull out a crumple of parking-tickets from her voluminous handbag and angrily demand what he was proposing to do about them.

The Heme & Illingworth cookery list was small but strong, its best writers having a solid reputation for reliability, originality and good writing. Miss Gurney was passionately committed to her job and her writers, seeing the novels and verse as irritating if necessary adjuncts to the main business of the house which was to nourish and publish her darlings. It was rumoured that she herself was an indifferent cook, one more indication of the firm British conviction, not uncommon in more elevated if less useful spheres of human activity, that there is nothing so fatal to success as knowing your subject. It didn't surprise Dalgliesh that she had seen his arrival as fortuitous and the chore of delivering Alice Mair's proofs as a near-sacred privilege. She said: 'I suppose they've called you in to help catch the Whistler.'