Ah, you mean http://www.themodernantiquarian.com/post/21675 & http://www.themodernantiquarian.com/post/21676

To me it looks artificial from the photies.

Was there water in the bottom? Could an animal like say a sheep, get it's head in? From what I can see, it reminds me of a coupla 'well-type' things I've seen.

love

Moth