The glass pearls

Karl Braun is a slight, grey-haired man who lodges in West London and works as a tuner for a firm of piano makers who know little or nothing about him. His fellow lodgers believe that he, like them, came to England to flee Hitler. But the outwardly poised Herr Braun is inwardly a very anxious man, wracked especially by newspaper reports of the ongoing hunt for Nazi war criminals.