Saturday, 26 March 2016

Inter-visibility of Causewayed Enclosures

I am puzzled why the Causewayed Enclosure of Rybury Camp, which is above where I live, is skewed off the top of the hill. Because of the later Iron Age banks, which are centred on the top of the hill, it is hard to immediately see this. It means that the camp would have been invisible from the Pewsey Vale. But it struck me that it also means it faces Milk Hill to the east. Knap Hill to the east of Milk Hill also faces it. Early Ordnance Surveyors used the sight line from Milk Hill to Neath Barrow, as Robin Hood's Ball was then called, to the south. And Windmill Hill by Avebury is just down the valley to the north.

I have Anquet's OMN on my system which allows me to plot route elevations, which give sightlines and it seemed that at the very flat summit of Milk Hill there was a possibility to find a place where all four were visible, though Robin Hoods Ball being 18 km away the visibility of it may be considered more theoretical to the naked eye.

There is, it is a very small area, there is permissive public footpath across the field to the summit so I urge you to find it for yourself, and with the right camera a much better photograph than my panorama may be possible.

Click to enlarge

1 comment:

  1. Why would Rybury Camp be on the exact top of the hill? ALL other 'causewayed sites' are also not "on the top" are are to one side of the apex. The reality is that if you find the reason they are not centred on top of their associated hills (nothing to do with line of sight) you will find out their rather obvious original function.