BRITISH ADMIRALTY, “LERO the ancient Leros and KALYMNO the ancient Kalymna” London 1864. Early British sea chart 62x48cm Leros, Kalymnos and part of Kos (Λέρος, Κάλυμνος, Κως) islands first published in 1844 after the survey conducted in 1837 by Commander Thomas Graves in H.M.S. Beacon. The current map offers the first corrections after the first edition. Cross-folded with some wear & small tears along folds.