There is no evidence of prehistoric or Roman activity in this area, but the area has not been fully excavated. In May 2004 a barbed and tanged arrowhead was found at Quarry Cottage, where Newton Lane meets Walworth Road. Because this site was a quarry, the arrowhead may have been moved from its original site before it was found. In 1991 some archaeological evaluation trenches were dug next to the castle itself, in advance of hotel development; however, no traces were found of archaeological material. About to the east of Walworth, in a field just east of Back Lane, is the site of a former post-medieval brick and tile works. There was another brick and tile works north-east of North Farm on Silver Hill, just west of Back Lane.