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The River Fleet is the largest of London's subterranean rivers. Its headwaters are two streams on Hampstead Heath, each of which was dammed into a series of ponds, the Hampstead Ponds and the Highgate Ponds, in the 18th century. At the southern edge of Hampstead Heath these descend underground as sewers and join in Camden Town. The waters flow from the ponds to the River Thames. The river gives its name to Fleet Street, the eastern end of which is at what was historically the crossing over the river known as Fleet Bridge, and is now the site of Ludgate Circus. ==History== The higher reaches of the river were known as the Holbourne (or Oldbourne), whence Holborn derived its name. The Fleet arises on Hampstead Heath as two sources, which still flow on the surface as the Hampstead Ponds and the Highgate Ponds. Then they go underground, pass under Kentish Town, join in Camden Town and flow onwards to King's Cross. King's Cross was originally named Battle Bridge, referring to an ancient bridge over The Fleet where Boudica's army is said to have fought an important battle against the Romans. The river then flows down Farringdon Road and Farringdon Street, and joins the Thames beneath Blackfriars Bridge. Its name comes from the Anglo-Saxon ''flēot'' "tidal inlet". In Anglo-Saxon times, the Fleet served as a dock for shipping. In Roman times, the Fleet was a major river, with its estuary possibly containing the oldest tidal mill in the world.〔(Spain, Rob: "A possible Roman Tide Mill", Paper submitted to the ''Kent Archaeological Society'' )〕 In Anglo-Saxon times, the Fleet was still a substantial body of water, joining the Thames through a marshy tidal basin over wide at the mouth of the Fleet Valley. Many wells were built along its banks, and some on springs (Bagnigge Well, Clerkenwell) and St Bride's Well, were reputed to have healing qualities; in the 13th century the river was called River of Wells. The small lane at the south-west end of New Bridge Street is called Watergate because it was the river entrance to Bridewell Palace. By the 13th century, it was considered polluted, and the area characterised by poor-quality housing, and, later, prisons (Bridewell Palace itself, Newgate, Fleet and Ludgate prisons were all built in that area). The flow of the river was reduced greatly by increasing industry. As London grew, the river became increasingly a sewer. In 1728 Alexander Pope wrote in his ''Dunciad'', "To where Fleet-ditch with disemboguing streams / Rolls the large tribute of dead dogs to Thames / The king of dykes! than whom no sluice of mud / with deeper sable blots the silver flood".〔''Dunciad'', book the second〕 Following the Great Fire of London in 1666, Christopher Wren's proposal for widening the river was rejected. Rather, the Fleet was converted into the New Canal, completed in 1680 under the supervision of Robert Hooke. Newcastle Close and Old Seacoal Lane (now just short alleyways off Farringdon Street) recall the wharves that used to line this canal, especially used by the coastal coal trade from the North East of England. (An adjacent narrow road, Seacoal Lane, also existed until the late 20th century when the present building fronting onto Farringdon Street was built, perhaps suggesting that a new wharf had been built near the old one.) The upper canal, unpopular and unused, was from 1737 enclosed between Holborn and Ludgate Circus to form the 'Fleet Market'. The lower part, the section from Ludgate Circus to the Thames, had been covered by 1769 for the opening of the new Blackfriars Bridge and was consequently named 'New Bridge Street'. The development of the Regent's Canal and urban growth covered the river in King's Cross and Camden from 1812. The 'Fleet Market' was closed during the 1860s with the construction of Farringdon Road and Farringdon Street as a highway to the north and the Metropolitan Railway, while the final upper section of the river was covered when Hampstead was expanded in the 1870s. The river gives its name to Fleet Street which runs from Ludgate Circus to Temple Bar at The Strand. During the 1970s, a planned London Underground tube was to lie under the line of Fleet Street and was originally named 'Fleet Line'. However this part of the route was not constructed when Sir Horace Cutler won a Conservative majority on the GLC and the line was terminated at Charing Cross and renamed as the Jubilee line to commemorate the Queen's Silver Jubilee of 1977. There were some objections to the cost of renaming the line and protest leaflets appeared with the slogan "Would Jubileeve It?". In one place the River Fleet is now 40 feet below street level. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「River Fleet」の詳細全文を読む スポンサード リンク
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