Thames potatoes

As an Irishwoman, I’m always pleased to see a nice potato and the Thames kind are no exception.

Thames potatoes are bricks that have been worn away into a pebble. “Captain Tidemark” reckons this process will take at least 50-150 years.

The London stock brick owes its distinctive yellow colour to the chalk content in the clay.

https://en.wikipedia.org/wiki/London_stock_brick