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In page Sunderland:
"In 1802 a new, 72 ft (22 m) high octagonal stone lighthouse was built on the end of the newly finished North Pier, designed by the chief Engineer Jonathan Pickernell. At the same time he built a lighthouse on the South Pier, which showed a red light (or by day a red flag) when the tide was high enough for ships to pass into the river.[1] From 1820 Pickernell's lighthouse was lit by gas from its own gasometer.[2] In 1840 work began to extend the North Pier to 1,770 ft (540 m) and the following year its lighthouse was moved in one piece, on a wooden cradle, to its new seaward end, remaining lit each night throughout the process.[1]
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