The River Thames is tidal through London, revealing a muddy foreshore at low tide that hides long-lost treasures—medieval tiles, glass bottles, coins, clay pipes, and countless ceramic fragments. The search for these artifacts is known as intertidal archaeology, but many prefer the more romantic term: "larking." Enthusiasts collect these tiny remnants everywhere—from gardens to beaches—gathering pieces of broken tea sets to clean and admire, each offering a glimpse into the past and the stories they might tell.