There are some inaccuracies in the postings for this site.
Its name is `The Hoarstones Stone Circle`.
It lies on the Black Marsh, near to the hamlet of Hemford. About 100 years ago, a local vicar suggested that it should be re-named as Marsh Pool, but it never caught on.
It`s listed under `South and West Wales`, whereas Mitchells Fold, less than two miles to the south, comes under `North Wales, Anglesey & the Isle of Man`, as in the book.
I suggest that these two sites are grouped together under `Mitchells Fold Complex`, as there are a number of other local sites which can be added to the category.
And Kammer, The Hoarstones hasn`t got any outliers. What you came across in the long grass is the remains of a cairn.