He was giving one of his studied Viennese smiles, the charm carefully painted in with a fine brush in the little lines about the mouth and eyes. ‘Keep in touch,’ he said, ‘and if you need any help… but I still think you are very unwise.’ He touched The Lone Rider. ‘I’m so proud to have met you. A master of suspense,’ and one hand smoothed the toupée, while another, passing softly over the mouth, brushed out the smile as though it had never been.
Graham Greene, The Third Man, 5.