Just south of Rybury Camp and All Cannings Cross there is a spring that is a source of the Hampshire River Avon. It is now piped and the original marshy spot infilled. The water then goes under the Kennet and Avon canal in a pipe, or drock as the old wiltshiremen called them. It is then piped across the fields and alongside the lane to the stream to the west of All Cannings. But old maps show it used to flow to the east before the canal and other modern improvements to the landscape.
I wonder what could be found at the original springhead as it has been protected underground from the plough for many years.