Not every treasure hunter swings a detector over ploughed fields. Some wade into Britain's tidal rivers at low tide, eyes scanning the mud for the glint of history. It's called mudlarking, and if you haven't tried it yet, you're missing one of the most accessible forms of treasure hunting there is.
The Thames alone has yielded Roman coins, medieval pilgrim badges, Tudor shoe buckles, Georgian clay pipes, and Victorian love tokens - all visible on the surface, no detector required. The river is Britain's longest archaeological site, and twice a day the tide reveals its secrets.
The term "mudlark" dates to the 18th century, when London's poorest would scavenge the Thames foreshore for coal, rope, bones, and anything sellable. It was grim work - children as young as six wading through sewage and industrial waste for pennies.
Today's mudlarking is considerably more pleasant. The Thames is cleaner than it's been in 150 years, and we're searching for history rather than survival. But there's something humbling about following in those footsteps, even if our wellies are better.
Here's where mudlarking differs from metal detecting - you need a permit, at least for the Thames. The Port of London Authority issues Standard Permits (surface finds only) for £95 per three years. That covers foreshore searching between Teddington Lock and the Thames Barrier.
Other rivers have different rules - some require landowner permission, others are freely accessible. Always check before you go.
Forget gold doubloons. Mudlarking rewards patience with pottery, clay pipes, and fragments of everyday life. But that's the beauty of it - these were ordinary objects used by ordinary people, and each one tells a story.
Typical Thames finds include:
Mudlarking is refreshingly low-tech. Here's what you actually need:
Some larkers bring a small trowel for teasing finds from the mud, but remember - on the Thames, surface finds only with a Standard Permit.
We're not going to reveal the closely-guarded honey holes (every mudlark has their secret spots), but public staircases at Bankside, Gabriel's Wharf, and Greenwich offer good access. Look for areas where the foreshore widens - more exposed mud means more finds.
Historical hotspots include areas near old wharves, former market sites, and anywhere the river bends to slow the current. Debris accumulated there for centuries.
Many JOMF members do both, and the skills complement each other beautifully. The patience you develop field walking translates directly to foreshore searching. The historical knowledge you build identifying hammered coins helps date mudlark finds.
Some larkers bring small pinpointers to the foreshore - not for digging, but to check promising lumps before picking them up. A target buried just below the surface might stay undisturbed until the next tide, ready for you to pluck out legally.
Don't overlook Kent and Sussex rivers. The Medway at Rochester has produced Roman and medieval finds. The Arun at Littlehampton yields Victorian material. Even smaller tidal creeks can surprise you - anywhere boats moored, people dropped things.
Different rivers, different permissions, different finds. But the same magic of holding something lost centuries ago.
Every clay pipe stem, every pottery sherd, every fragment of worked bone is data. Mudlarkers have contributed enormously to our understanding of London's past, documenting finds and reporting significant objects to the Museum of London.
It's history without barriers - no expensive equipment, no landowner negotiations, no access fees beyond the permit. Just you, the river, and 2,000 years of lost and discarded objects waiting to be found.
Next low tide, consider leaving the detector at home and trying the foreshore. You might just get hooked on another way to hunt history.
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