reasonably easy to follow. It is marked on the Ordnance Survey map of Roman Britain and was shown on the first edition maps by the Ordnance Survey produced in 1824. Much of it is still marked on the modern 1:25,000 map and the 1:2,500 map. However, the southern section from Peterborough to Waterbeach is not so easy to follow. The 2001 map of Roman Britain shows the dyke from Peterborough terminating to the north of Ramsey, with another isolated section running northwards from Waterbeach on the River Cam. The short section between Waterbeach and the Cam is known as The Old Tillage, a name deriving from a dialect word for loading and unloading. Modern maps mark the section below Peterborough as Cnut's Dike, and Historic England argue that there is no proven link from Peterborough to Waterbeach, and therefore put its length at . At the northern end, the first recognisable remains are to the north of the B1190 road through Washingborough, where the south bank runs between gardens and allotments. Material from the north bank was used to construct new banks for the River Witham in the early 19th century, as part of a project to replace the original locks at Kirkstead and Barlings with new locks at Stamp End and Bardney, authorised by an Act of Parliament obtained in 1808. There are then six short sections which are listed as scheduled monuments, with gaps due to the construction of houses and a community centre on the line of the remains. Its course then turns to the south-east, running parallel to the B1190, as it heads through Branston Booths, passing the end of Branston Delph and Carr-Dyke Farm, one of many similarly named farms along its length, to reach Potterhanworth Booths. Much of its route has become part of the modern land-drainage infrastructure, and so the remains are not particularly well preserved. It then heads broadly southwards across open countryside and forms the eastern boundary of Potterhanworth Wood. In Nocton Fen it passes to the east of the site of Nocton Park Priory, and then there is another scheduled section, bordered to the west by Nocton Wood, and connected to Nocton Delph, which flows eastwards to the River Witham. In Metheringham Fen it turns to the east, and there are two short scheduled section after Blankney Wood, divided by the buildings of Oak Tree Farm. It then resumes its