Example image of eyePlorer eyePlorer map for 'Semaphore line': Napoleon I of France Flag semaphore Electrical telegraph Post riders Hydraulic telegraph Smoke signal 1684 Robert Hooke Royal Society 1683 Battle of Vienna Claude Chappe France Sweden United Kingdom Agustín de Betancourt Austria England French Revolution Netherlands Prussia Marseille Toulon 1791 March 2 Chouannerie Paris Place Charles de Gaulle Lille Condé-sur-l'Escaut Strasbourg Commodity Clermont-en-Argonne Code Abraham Niclas Edelcrantz Drottningholm Stockholm Gothenburg Karlskrona Admiralty Lord George Murray (bishop) Bidston Deal, Kent Higham, Kent Hilbre Island Holyhead Liverpool Llysfaen London Point Lynas Lighthouse
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