With a great nephew having recently arrived and been given the splendid middle name of Rybury I was prompted to search out the report on Rybury and its causewayed enclosure. It is overlain by the much more prominent Iron Age hill fort but because it is tilted off the crown of the hill it is still mostly visible. The Iron Age folk being more concerned with building a defensive position ringed the crown of the hill.
Th detailed report on the causewayed enclose is at http://archaeologydataservice.ac.uk/archiveDS/archiveDownload?t=arch-1416-1/dissemination/pdf/9781848021877_ALL.pdf
Britain from Above has some 1947 photos of the area as well: