“Rather than throw the white arsenic away, it was realised that money could be made by selling the substance as a poison to get rid of all kinds of vermin, including cockroaches, rats, stray animals - as well as relatives and secret lovers.” PoisonArsenic Book:A Taste for Poison: Eleven Deadly Molecules and the Killers Who Used Them Source: A Taste for Poison: Eleven Deadly Molecules and the Killers Who Used Them