 The diameter of the outer (Q) circuit is c. 26.2 m and that of the inner (R) is, 22.5 m; with an average spacing between the paired stone settings of 1.5 m. These trench-like intrusions are roughly 2 m long and 1 m wide, set radially and slightly enlarged at each end to provide paired stone sockets to a depth of around 0.6 m, the intervening strip generally re-filled with chalk rubble.Atkinson described them as being ‘dumb-bell’ shaped, although not all were of this form.The bases of some sockets bore ‘the impressions…of heavy stones’ some with ‘minute chips of dolerite [i.e.