Admiralty chart of Andros Island and Cape Doro strait (today Kafireus Strait), Greece. Includes a large scale chart of Gavrion Bay (1844).
Office of Hydrographer to the Admiralty, headed by <a href="https://en.wikipedia.org/wiki/Francis_Beaufort" class="extiw" title="w:Francis Beaufort">Admiral Beaufort</a>
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