From surveys taken in 1977 - corrected to 1979 (3 x copies).

Admiralty Chart No 1777 - Port of Cork - Lower Harbour and Approaches | National Museums Liverpool

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https://www.liverpoolmuseums.org.uk/artifact/admiralty-chart-no-1777-port-of-cork-lower-harbour-and-approaches

Admiralty Chart No 1777 - Port of Cork - Lower Harbour and Approaches

http://content.liverpoolmuseums.org.uk/artifact/admiralty-chart-no-1777-port-of-cork-lower-harbour-and-approaches