>>1650663The tubes are 100% clay pipe stem (English archaeologist here). They would have been made in the UK and shipped to the New World. They are early - probably 17th Century or early 18th - as they are thick and flattened (later pipe stems show better technique).
You have a nice early site nearby, although possibly not on your land, as they seem to have been rolled by the river. Still, worth having a look around - any pottery or stone walls will give you a clue.
