This podcast episode explores the origins and purpose of mudlarking, a historical practice in England where people would collect items along the mud banks of the River Thames. While mudlarking is now a hobby, it was originally a means of supporting oneself. The Thames's long history and dense population have resulted in thousands of years' worth of potential treasures being deposited in its muddy banks. Mudlarking on the Thames requires a permit, and valuable items must be given to the authorities. The episode also discusses the historical significance of clay pipes found in the Thames, as well as the hazards and certain notable finds, such as the recovery of the long-lost Doves Press typeface.