Here are some things I've found in and around the River Thames*:

*Yes, you need a permit to do this. I'm not taking questions about that at this time.

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Chunk

Idk I didn't find this one

I just wanted to test these flip cards

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Decorated Clay
Pipe Stem

A section of the stem of a clay tobacco pipe. This one has some interesting decorative patterns on it.

A lot of clay pipe stems were plain, reserving the decoration for the bowl, but sometimes they had patterns and makers marks stamped into them. I haven't been able to find a match for this one in any archive yet.

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Chunk

Idk I didn't find this one

I just wanted to test these flip cards

Avatar

Chunk

Idk I didn't find this one

I just wanted to test these flip cards

Avatar

Chunk

Idk I didn't find this one

I just wanted to test these flip cards

Avatar

Chunk

Idk I didn't find this one

I just wanted to test these flip cards

Climb back out