From an edition of Great Britain's Coasting Pilot.

Sea Chart - Chart of Liverpool Bay by Captain Greenville Collins | National Museums Liverpool

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https://www.liverpoolmuseums.org.uk/artifact/sea-chart-chart-of-liverpool-bay-captain-greenville-collins

Sea Chart - Chart of Liverpool Bay by Captain Greenville Collins

http://content.liverpoolmuseums.org.uk/artifact/sea-chart-chart-of-liverpool-bay-captain-greenville-collins