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Camp Down, Portsdown Hill
Camp Down is a location at Portsdown Hill, Hampshire, which was used as an Admiralty semaphore station and later as a redoubt on the line of Palmerston Forts, Portsmouth.〔(English Heritage - Site of Camp Down Admiralty Telegraph Station )〕
The Admiralty Telegraph Station was built at Camp Down in 1821 and it operated on the semaphore line from London to Portsmouth from 1822 to 1847.
Farlington Redoubt was built on the site as a result of the 1859 Royal Commission, as part of a series of fortifications built to defend Portsmouth and its dockyard (which is away) from a possible attack from ''inland'', as the development of rifled gun barrels made it possible for an invading army to land elsewhere, circle around to the top of the hill and bombard the city from there, rendering the existing Hilsea Lines at the bottom of the ridge useless. The redoubt formed the eastern limit of a series of 6 forts which were planned along the of the ridge.
The site is now quarried away.
==References==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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