Bronze Age barrows
There are nine prehistoric round barrows, or tumuli, on the Warren. There are records that, in the early nineteenth century, amateur archaeologists unearthed Bronze Age cremation urns on one of the barrows. The barrows are listed as Ancient Monuments and under the protection of English Heritage. Excavation of the barrows is now not allowed and the growth of trees and shrubs on the barrows is controlled to prevent damage by their roots.
Many of the barrows, such as the largest barrow with the memorial seat at it’s centre, have required work during the past forty-five to remedy surface erosion caused by public access. While some public access is permitted, i.e. access by foot where designated paths exist on a barrow, erosion is caused by people cycling and even horse-riding and motorbike riding. None of these are permitted anywhere on Sullington Warren under the National Trust byelaws. Also, people create new, unauthorised, paths on the barrows which increase erosion and damage to them.
Windmill
There used to be an open trestle post mill on high ground at the southern most part of the Warren. The windmill was important to the locality and worked in conjunction with Chantry water mill until the early part of the 20th century. It eventually fell into disuse and destroyed by fire in 1911. Only the shaft of the windmill survives.
Memorial seat
The seat on the largest barrow commemorates Enid Clarke-Williams who was the Secretary of the National Trust Local Committee from 1935. Miss Clarke-Williams led the group of fund-raising residents who, in around 1935, helped the National Trust acquire part of Sullington Warren. Part of Sullington Warren was given to the National Trust by Horsham District Council in 1986. The seat was originally constructed between June and August 1956 by the family of Edward Mitchenor Cook, who was a keen walker of the South Downs. It bears the inscription “In memory of Edward Mitchenor Cook, Knight, CSI, CIE. A man of Sussex”. Of course as the barrows are Scheduled Ancient Monuments the erection of seats and other structures on them would not now be permitted.