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There was in France at the end of the 18th century a complete and working installation of optical telegraph. During the Revolutionary period, a French inventor, Claude Chappe (1763-1805), convinced the Deputies to set up a huge network between major cities. It was used for army and national communications till the 1850s.

A chain of semaphores was built in England during the Napoleonic Wars in the 19th century to warn London of a French invasion. The chain ran from the AdmiraltyFor the international law of the sea, see Admiralty law. For the area of Hong Kong, see Admiralty, Hong Kong Whitehall, London, Thomas Ripley, architect, 1723-26, was not admired by his contemporaries and earned him some scathing couplets from Alexander P in WhitehallHouses of Parliament Whitehall is a road in London, the capital of the United Kingdom, running two-thirds of the distance from Trafalgar Square towards Parliament Square; the other third constitutes Parliament Street. The two streets cover a combined dist to PortsmouthThis article is about the English city of Portsmouth. For other places with the same name, please see Portsmouth (disambiguation). Portsmouth is a city of about 186,000 located in the county of Hampshire on the southern coast of England. A significant nav in the English ChannelThe English Channel is the part of the Atlantic Ocean that separates the island of Great Britain from northern France, and joins the North Sea to the Atlantic. In French it is called La Manche ("the sleeve"). It is about 350 miles long and at its widest i. As a result there are several locations still called Telegraph Hill. There is a restored example on a hill at Chatley Heath in SurreyThis is about Surrey, England. There are also articles about other uses of the name Surrey. Surrey is a county in southern England, one of the Home Counties'. It is divided into a number of districts Elmbridge, Epsom and Ewell, Guildford, Mole Valley, Rei.

Throughout Chinese history, smoke signals were used as communication tool during war time. Until these days, the Chinese phrase 烽火 (feng1 huo3, fire signals) is still used as a synonym for war.