Ring of Bookan

At an OAS set of talks tonight audience shown an aerial photograph showing a cropmark [nearer Bockan than Buckan it looked] in a field on the opposite side of the road to the Ring of Bookan and being a circular feature of much the same dimensions to it. Given as a possibilty that this relates to a recorded flint scatter hereabouts, presumably a reference to the small brown & yellow mottled ground flint hammer from Bockan (NMRS record HY21SE 52). More to the point is that Bockan house was part of traditions centred round the two great circles and used to have some idols [possibly Iron Age, like those at e.g. Brecks of Netherbrough and Dale souterrain, rather than Neolithic ?]