Mudlarks?

[lsanderson]

London's Mudlarks Retrieve History From the Thames
By REUTERS
Published: March 2, 2011

LONDON (Reuters Life!) - It's seven in the morning and we kneel in black mud on the freezing banks of London's River Thames in the shadow of St Paul's Cathedral, where a church has dominated the ancient city since the 7th century.

As the tide ebbs exposing the shore, Steve Brooker casually tosses a 17th century trader's token he has found in the dirt into his bucket. More