"That man knows too much!" "Do you really think he overheard?" "He may not have done. But we must take no risks, my dear fellow. Remember we are at war! With people who know too much there's but one way-dismissal," declared Lewin Rodwell, the tall, well-groomed middle-aged man, in morning-coat and grey trousers, who stood in the panelled boardroom with his chairman, Sir Boyle Huntley, the other directors having left after the weekly meeting of the board.