In all honesty...I hate to let this "secret" out of the bag! Yes, the River Thames is a treasure chest of ancient artifacts and they're yours for the taking.

Kari on Thames River London
Ohhhhhhhh....now I've said it...but don't misuse this great revelation...please leave some for me when I can go back!
You think its fun rummaging through old garbage dumps in the USA...I know you...you have a metal detector and can spot a gold watch a mile down or an old coin right through the dirt.
Well...guess what? The River Thames has been a dumping ground not for hundreds of years...but thousands!
Yes, it's true. The London area has been populated since 2,000 years BEFORE the birth of Christ...Yup...and for 4,000 years the Thames River has been its favorite dumping grounds.
The great fire of London? Well, I suppose most of that refuse went straight over the banks into the river, which is why it now yields up endless hand forged nails, roof tiles, pottery pieces and the most fun of all...pieces of broken clay pipes.
Yup...like the one in this painting.

Man with Clay Pipe

Antique Clay Pipe from 1600'sApparently, these pipes were purchased already filled with tobacco and then thrown away after smoked.
You're just dying to see some more photos of me scounging around in the mud for artifacts aren't you? Ok...here's some more proof that I hauled back several pounds of River Thames artifacts with me to Iowa.