The strange case of the poison pen letters | Crime fiction | The Guardian
BITE SIZED: The Origins of the Poison Pen Letter - Naked History
The Poison Pen Letter: The Early 20th Century's Strangest Crime Wave ‹ CrimeReads
Who's the poison pen neighbour terrorising my family? The letters have been arriving for 10 years - spitting venom at her modern house, her children's pink bicycles and even her pot plants