Through his accusatory letters, Cream succeeded in drawing close attention to himself. Not only did the police quickly determine the innocence of those accused, but they noticed something telling in the accusations made by the anonymous letter-writer: he had referred to the "murder" of Matilda Clover. In fact, Clover's death had been registered under natural causes, related to her drinking. The police quickly realised that the false accuser who had written the letter was the serial killer now referred to in the newspapers as the 'Lambeth Poisoner'.