"Oh! BY THE WAY"
When I came across the plough blade my heart went out to the "farmer"of some four or five hundred? years ago who tried hard to cultivate his land, and failed; only to leave his last plough at the place where it succumbed to the horrendously aggressive demands of what was then his/her topsoil.
Please view recently posted photographs and give particular attention to the top two horizons. The ploughshare was retrieved from their interface!