Geophysical surveys at Robinhood's Ball Causewayed Enclosure, Wiltshire in 2015By Olaf Bayer and Anthony Johnson
Gradiometer, earth resistance and magnetic susceptibility surveys of Robinhood’s Ball causewayed enclosure and adjacent monuments were carried out by staff and students from Oxford University’s Department for Continuing Education in summer 2015. Key results of the survey included a large number of potential pits of unknown date both inside and outside the Neolithic enclosure circuits, an element of possible Bronze Age field system abutting the enclosure, and a second ring ditch within one of the adjacent Early Bronze Age round barrows.
Robinhood's Ball is located approximately 4km north west of, and intervisable with, Stonehenge. It is the only causewayed enclosure in the Stonehenge landscape and, by analogy with other similar sites, provides evidence of a focus for seasonal gatherings, exchange and ritual activity predating the first phase of Stonehenge by c. 600 years. ... The monument has seen surprisingly little recent attention given its proximity to Stonehenge and the important role part that it plays in the development of the surrounding landscape. No new fieldwork has been undertaken on the site as part of recent research.....
More on Robin Hood's Ball and its previous name of Neath Barrow - http://www.sarsen.org/2011/12/neath-barrow-mystery-solved-its-robin.html