History of the Telegraph Timeline

The Great Western Railway opened a 21-kilometer Cooke and Wheatstone five-needle telegraph along its Paddington-to-West Drayton route. It quickly proved invaluable for railway operations, including tracking trains and catching criminals.

Image source: Great Western Railway

The United States Congress appropriated $30,000 for Samuel Morse to build an experimental telegraph line between Washington, D.C., and Baltimore. The project marked the U.S. government's first major investment in electrical communication.

Image source: Baltimore–Washington telegraph line

Samuel Morse transmitted the biblical phrase 'What hath God wrought' from the U.S. Capitol to the B&O Railroad depot in Baltimore, inaugurating the first American telegraph line. The demonstration electrified public imagination about instantaneous communication.

Five New York newspapers formed the Associated Press to share costs of telegraphing news from the Mexican–American War front. The telegraph transformed journalism, enabling near-instantaneous reporting across vast distances.

Image source: Associated Press

Both Union and Confederate forces relied heavily on telegraph lines for command and coordination during the Civil War. President Lincoln famously used the War Department telegraph office extensively, making it a de facto command center.

Image source: U.S. Military Telegraph Corps

Western Union completed the first transcontinental telegraph line, linking California with the eastern United States. The Pony Express ceased operations just two days later, as messages that once took ten days by horseback now crossed the country in minutes.

Image source: First transcontinental telegraph

Improved stock tickers connected to telegraph networks delivered price quotations to brokers across cities in real time. Telegraphic arbitrage linked markets like New York and London, creating the first truly integrated global financial markets.

Image source: Ticker tape

Joseph Stearns introduced the duplex telegraph, allowing two messages to be transmitted simultaneously in opposite directions on a single wire. Later multiplex systems expanded capacity further, dramatically increasing the efficiency of existing infrastructure.

Twenty European states signed the first International Telegraph Convention in Paris, establishing standardized rules and tariffs for international telegrams and founding what became the International Telecommunication Union (ITU).

Image source: International Telecommunication Union

After earlier failures in 1857 and 1858, the steamship Great Eastern successfully laid a durable transatlantic cable from Ireland to Newfoundland. Cyrus Field's achievement enabled direct telegraphic communication between Europe and North America.

Image source: Transatlantic telegraph cable

The Indo-European Telegraph Company completed a land and submarine route connecting Britain with India via Persia and the Persian Gulf. Messages between London and Calcutta that once took weeks by ship could now arrive within hours.

Completion of the Pacific cable between Canada and Australia finished the 'All Red Line,' a network of telegraph routes circling the globe entirely on British territory. It provided secure imperial communications independent of foreign-controlled cables.

Image source: All Red Line

On the first day of World War I, Britain cut Germany's undersea cables, forcing German traffic onto British-controlled or neutral routes that could be intercepted. Cable control became a crucial element of Allied intelligence throughout the war.

Image source: United States in World War I

British cryptographers decrypted a German diplomatic telegram proposing a Mexican alliance against the United States. Its publication inflamed American public opinion and helped bring the United States into World War I.

Image source: Zimmermann Telegram

Teleprinters (teletypes) allowed operators to type messages directly onto punched tape and transmit them automatically using start-stop codes. They replaced manual Morse keying on many circuits and paved the way for data networks.

Image source: Teleprinter

The Washington conference unified regulations for radiotelegraphy and wired telegraphy, assigning frequency bands and standardizing procedures as radio began competing with cable telegraphy for international traffic.

The first transatlantic telephone cable began service, carrying 36 voice channels that also handled telegraph traffic. Voice-grade circuits and later digital technologies gradually displaced traditional telegraph services.

Image source: TAT-1

Western Union quietly ended its domestic telegram service after 155 years, citing competition from email and text messaging. The shutdown symbolized the end of the classic telegram era in the United States.

Image source: Western Union

State-run Bharat Sanchar Nigam Limited closed India's telegraph service, which had operated since 1851. Thousands of Indians queued to send final telegrams before the network shut down, marking the end of one of the world's last major public telegraph systems.

Belgium's bpost shut down its last public telegraph counter, widely reported as the end of commercial public telegraphy in Europe. The closure underscored how thoroughly internet-era messaging had rendered the 19th-century technology obsolete.

Image source: Telegraphy