Whether it's a declaration of love, anger or rebellion against the government, graffiti can give us incredible insight into the social history of everyday people.

By the 18th century it's recognised by authorities a serious social problem and a threat to their positions of power.

How was graffiti used to fuel political unrest? How was it used to aid the sex trade? And how was it used in solving a murder trial? 

Joining us today is Maddy Pelling, co-host of sister podcast After Dark and author of the book Writing on the Wall: Graffiti, Rebellion and the Making of Eighteenth-Century Britain, released on March 28th and available for pre-order now.

This episode was edited by Tom Delargy. The producer was Stuart Beckwith. The senior producer was Charlotte Long.

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