PRN39228 A group of irregular and sub-rectangular enclosures and ditches visible on aerial photographs. The enclosures are on the edge of the fen off Billingborough Drove, east of the Car Dyke. There is a fairly straight linear cropmark of a ditch (or perhaps a double ditch) running westwards from the enclosures that may be related.{1} The cropmarks’ morphology would suggest the cropmark enclosures date to the later prehistoric. {2}