The subterranean or underground rivers of London are the tributaries of the River Thames and River Lea that were built over during the growth of the metropolis of London. Since it is difficult to stop water from flowing downhill, the rivers now flow through underground culverts. (Nicholas Barton, The Lost Rivers of London, Historical Publications, ISBN 0-948667-15-X). River Thames – north bank from east to west: River Thames – south bank: * The River Peck * The River Neckinger * The River Effra * The Falconbrook * The Graveney River * Beverley Brook * Earl's Sluice