I found this picture on the Wiltshire Council site about Shrewton
It is labelled "Church of St. Mary, Shrewton" (click picture for larger)
It looks like two sarsens in a stream or at a spring, but where they are in Shrewton I don't know.
They might not be sarsens but I would love to look at them.
If you know where they are please tell me.
There are sarsen stones in Shrewton, and tonight I looked at a couple of very interesting rocks there, more on them after some more investigation.