I read an article, maybe a link on Forums, about people in England who prospect for old clay pipes, disposable discards, from the seventeen and eighteen hundreds, maybe some older. These are exposed at low tide on the riverbanks of the Thames. These were originally smoked in coffee shops and pubs and discarded. I assume some of these are smoked by treasure hunters, if enough is left to provide a smoke. A four hundred year old pipes sounds like a real time machine. Are there any older pipes to be found that could be smoked?