The recent excavation work (the Summer Dig) funded by Navenby Development Corporation (NDC) and managed by Preconstruct Archaeology (PCA) with volunteer support from NAG and other local groups has resulted in a cooperative venture that is beginning to show us more about the history of Navenby in both Roman times and well before the Romans arrived. Of particular recent interest is the possibility of a henge located across the area of the Open Space adjacent to High Dyke.
A composite picture of geophysics scans of the area to the west of High Dyke recorded in 1994 as part of the surveys prior to construction of the new estates and scans of the eastern side of High Dyke made by NAG in 2007 as part of the High Dyke Survey Project supported by the Heritage Lottery Fund, shows evidence of a large circular feature approximately 130 metres in diameter.
The Navenby Circle.
Archaeologist Jim Rylatt who is leading the Summer Excavation of the Roman site and has recently been involved with excavations at Stonehenge, has identified the circle as a possible henge and, if so, it would be the largest found in Lincolnshire and dating to as early as 2,500BC. The story was announced in the Lincolnshire Echo on Monday 6th July.
Other features shown by the geophysics are thought to be a pre-Roman enclosure with round-houses to the west of the circle and barrows to the north. A small circular feature on the eastern side may be another such barrow. Both sides of High Dyke show evidence of later construction above the early features which is thought to be part of the Roman settlement in Navenby.
Ermine Street, now High Dyke, makes a slight turn from the straight road to Ancaster just south of the site which puts the road through the circle. It is interesting to wonder if the Roman military engineers who laid the road deliberately turned to go through the circle and stamp their authority on the local population.
Further excavation will be needed to prove the circle does represent a henge - to find the ditch or ditches and signs of an embankment that would have been visible.