The London to Lewes Way is a long Roman road between Watling Street at Peckham and Lewes in Sussex. The road passes through Beckenham and West Wickham, then crosses the North Downs above Titsey, on the county boundary between Surrey and Kent, and is overlain by Edenbridge High Street. The road continues on this alignment onto the high ground of Ashdown Forest, where the more grassy vegetation on the silted up outer ditches contrasts very clearly with surrounding heather in aerial photographs, then descends through Piltdown to Lewes, linking with the Sussex Greensand Way at Barcombe Mills and with a network of roads at Lewes. Dating evidence First and early second century pottery fragments were found over the edge of the road near Barcombe Mills, which, together with the heavy construction and planned alignments, indicate a late 1st or early 2nd century date. Design and construction Five main alignments were used for the road, with local diversions from them to ease gradients and avoid wet ground. Flint and gravel were used over the North Downs and towards the South Downs, with slag from the Wealden iron industry used extensively for the middle sections, sometimes mixed with sandstone from Ashdown Forest and sometimes as a solid mass. At Holtye near East Grinstead a length of road excavated in 1939 revealed iron slag metalling showing cart ruts. Part of this has been left exposed and fenced off by the Sussex Archaeological Trust for viewing. The width of the road varies greatly between places, from as narrow as to as wide as at Butcher's Cross, Hartfield. As no kerb was used the intended width is not known and spreading of material may have increased the eventual width. Where the road crosses hillsides on terraceways the width is about . Where outer ditches are visible on Ashdown Forest they are apart. Thickness of metalling also varies greatly, as does the size of agger. In some places a thick mass of iron slag was laid on the land surface, as at the excavated section at Holtye where the slag metalling was in the centre reducing to at the edges, laid directly on the clay subsoil and rusted into a concrete-like mass. Elsewhere an earth agger was protected by a much thinner stone layer, as on Ashdown Forest near Five Hundred Acre Wood where only about of compacted sandstone lumps were bedded on of yellow clay.