small blue and brown argus butterflies. The tall grass encourages magnificent displays of burnet moths. To the north of the City boundary this secondary chalk grassland continues on Devil’s Dyke Farm land (). A prehistoric barrow () marked that boundary, but is now only detectable by a slight rise in the fence line as it crosses the ploughed-out mound. In a good evening light you can see the lynchet lines of an Iron Age field system in Adder Bottom () just west of the Devil’s Dyke Farm. Round Hill. to the north east, is a special place too. There are signs from a number of periods of human history. There are many old barrows in the area and even the name Skeleton Hovel for the old flint barn () is thought to commemorate a prehistoric burial site unwittingly discovered during farming work. Round Hill's eastern slope () is the richest chalk grassland site in Hangleton, although it desperately needs grazing management for its many downland flowers such as field fleawort, chalk milkwort, orchids, cowslips, hairy violet, rockrose, crested hair-grass and devil’s bit scabious. There are two rare Forester moth species, fox moth and heath moth, purse-web spider, moss and pygmy snails. To the north of Round Hill is the Newtimber parish. To the north of this part of Brighton and Hove downland area are the Poynings and Newtimber parishes and the impressive geography of Devil's Dyke. Toads Hole Valley Between Hangleton and Westdene, south of the A27, is Toads Hole Valley. Its west slope, below Downland Drive was once a rich, grazed downland area, and it is still home to threatened species such as dormice, hedeghogs and adders. The valley has been unmanaged for many years and the area has turned to scrub. It has now been designated for development and up to three hundred homes are planned to be built on the site. Other amenities Hangleton Library was built in 1962 and was opened by the Queen and the Duke of Edinburgh that summer. The building, which incorporates a block of flats, cost £22,460. Before this, two temporary libraries had operated since the 1940s: one on the Knoll Estate and another in Hounsom Memorial Church hall. Hangleton Community Centre is in Hangleton Park. It opened in 1988 and cost £250,000 to build, most of which came from a grant by Hove Borough Council. Local architect Robin Chandler designed the