"supposed subterranean stream" . "subterranean rivers of London" . "subterranean" . "culverted" . "underground" . . "covered over" . "predominantly underground" . "buried stream" . "underground rivers" . "London's subterranean rivers" . "mainly diverted to surface and combined sewer drains" . "underground tributaries" . "Subterranean rivers of London#Subterranean rivers in London" . "Subterranean rivers of London" . "subterranean river" . "London's underground rivers" . "\\\"lost\\\" rivers of London" . "now-covered" . "lost rivers or streams" . "buried or converted into canals" . "Rivers of London" . "\\\"lost\\\" rivers or streams of London" . "London's hidden rivers" . "underground river" . "London's 'lost' rivers" . "Subterranean rivers of London" . "numerous streams" . "natural tributary system of the Thames Tideway" . . "London\u2019s lost rivers" . "subterranean rivers" . "London's \\\"lost\\\" rivers" . "flow under modern-day London" . "former rivers in London" . . "encased" . . "diverted to surface and combined sewer drains" .