The case of Mrs Lorrimer promised to be one of Doctor Morelle's most mysterious problems. She had telephoned begging him to attend her immediately, claiming her life was in imminent danger. Three attempts had already been made to murder her that same day - Her drink had been posined, a deadly snake hidden in her bed, and poison gas was being introduced into her room
But was she really in danger? Was she simply mad - or pretending to be mad? Either...