River Fleet
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The River Fleet is the largest of London's subterranean rivers. It formerly flowed on the surface. It rises from two springs on Hampstead Heath and is directed into two reservoirs constructed in the 18th century, Highgate Ponds and Hampstead Ponds. From the ponds the water flows underground for 4 miles to join the River Thames. The higher reaches of this flow were known as the Holbourne (or Oldbourne [1]), whence Holborn derived its name. The water initially flows in two paths before joining up and passing under Kentish Town and Kings Cross. Kings Cross was originally named Battle Bridge, referring to an ancient bridge over The Fleet where Boudica is said to have fought an important battle against the Romans. The river then runs down Farringdon Road and Farringdon Street, and joins the Thames beneath Blackfriars Bridge.
Its name comes from the Anglo-Saxon Holburna = "hollow stream", referring to its deep valley, and flēot = "estuary." In Anglo-Saxon times, the Fleet served as a dock for shipping.
In Anglo-Saxon times, the Fleet was a substantial body of water, joining the Thames through a marshy tidal basin over 100 yards wide at the mouth of the Fleet Valley. A large number of wells were built along its banks, and some on springs (Bagnigge Well, Clerkenwell) were reputed to have healing qualities. As London grew, the river became increasingly a sewer. By the 13th century, it was considered polluted, and the area was given over to poor-quality housing, and, later, prisons (Newgate, Fleet and Ludgate prisons were all built in that area). The flow of the river was greatly reduced by increasing industry.
Following the Great Fire of London in 1666, Christopher Wren proposed widening the river; however, this was rejected. Rather, the Fleet was converted into the New Canal, completed in 1680. Old Seacoal Lane (now just a short alley off Farringdon Street) recalls the wharves that used to line this canal. Unpopular and unused, the canal was filled in from 1737. The river survived slightly longer: The section from Holborn to Fleet Street was channelled below the surface when the canal was filled, with the section to the river covered by 1765. The development of the Regent's Canal and urban growth covered the river in Kings Cross and Camden from 1812. The Farringdon Road section was built over again in the 1860s with the construction of the Metropolitan Railway, while the final upper section of the river was covered when Hampstead was expanded in the 1870s.
In the 1970s, the river gave its name to a planned London Underground tube line which was to run alongside the route of the former river but, prior to opening and in honour of the Queen's Silver Jubilee in 1977, the name was changed from Fleet Line to Jubilee Line and the route changed.
The Fleet can be heard through a grating in Ray Street, Farringdon (EC1) [2] in front of the Coach and Horses pub. The position of the river can still be seen in the surrounding streetscape with Ray Street and its continuation Warner Street lying in a valley where the river once flowed. It can also be heard through a grid in the centre of Charterhouse Street where it joins Farringdon Road (on the Smithfield side of the junction).
[edit] In fiction
The River Fleet features in a serial from the BBC series Doctor Who entitled The Talons of Weng-Chiang, starring Tom Baker. In one episode, the Doctor claims he once caught a large salmon in the Fleet, which he shared with the Venerable Bede. It also features in Neal Stephenson's novel The System of the World and in The Horn of Mortal Danger by Lawrence Leonard.
