Stone rails, Haytor Tramway, 1820.
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Remains of the granite troughs which were used as rails. Ponies were used to haul trucks of granite from the quarries at Hay Tor on Dartmoor, which was the main source of granite in Britain during the mid-19th century. Hay Tor granite was used for such buildings as the new London Bridge (completed in 1831) and parts of the National Gallery (1832) and Covent Garden Market (1830).