Chislehurst its earlier format corresponded to the letters IMP (for "imperial"). The Chislehurst civil parish formed an urban district of Kent from 1894 to 1934. In 1934 it became part of the Chislehurst and Sidcup Urban District, which was split in 1965 between the London boroughs of Bromley and Bexley. The Walsingham family, including Christopher Marlowe's patron, Sir Thomas Walsingham and Queen Elizabeth I's spymaster, Francis Walsingham, had a home in Scadbury Park, now a nature reserve in which the ruins of the house can still be seen. A water tower used to straddle the road from Chislehurst to Bromley until
Francis Walsingham was among those tortured and found guilty on the basis of extracted evidence; he was hanged, drawn and quartered at Tyburn in 1581. Walsingham could never forget the atrocities against Protestants he had witnessed in France during the Bartholomew's Day massacre and believed a similar slaughter would occur in England in the event of a Catholic resurgence. Walsingham's brother-in-law Robert Beale, who was in Paris with Walsingham at the time of the massacre, encapsulated Walsingham's view: "I think it time and more than time for us to awake out of our dead sleep, and take heed lest like mischief as