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Cables, Submarine --- Telegraph --- Investments, European --- History. --- Electric telegraph --- Postal telegraph --- Telegrams --- Ciphers --- Communication and traffic --- Telecommunication --- European investments --- Ocean cables --- Submarine cables --- Submarine telegraph --- Telegraph, Submarine --- Electric cables --- History --- Cables [Submarine ] --- South America --- Investments [European ] --- Cables, Submarine - South America - History. --- Telegraph - South America - History. --- Investments, European - South America - History. --- Compagnies de navigation --- Amerique du sud