It was a misty in the hollows sort of morning.What's shown as frost,I took for mist,at the time.The ring of small stones,isn't marked on the OS Map,as such,it's only now I'm home,that I can see it.I couldn't get access to the field,the hedgerow was really dense and tall.I had to hold the camera to maximum height and hope for the best.
see http://www.megalithic.co.uk/article.php?sid=26080
see http://www.geolocation.ws/v/W/4cc128671d41c8067f0131ce/iron-age-earthworks-llanddewi-velfrey-/en