What Happened to The First Transatlantic Telegraph Cable?

The vision of connecting Europe and North America with a telegraph cable across the Atlantic Ocean emerged in the mid-19th century, driven by entrepreneurs like Cyrus West Field. Before this, communication between the continents relied on ships, a process that could take weeks or even months. Field, a New York paper manufacturer, became the driving force behind the Atlantic Telegraph Company, securing funding and orchestrating the ambitious project despite having little prior knowledge of telegraphy. Initial attempts to lay the cable in 1857 faced significant challenges, with the cable breaking multiple times in deep water, forcing the abandonment of the operation for the year.

Perseverance led to a renewed effort in 1858. Using two ships, HMS Agamemnon and USS Niagara, the cable was successfully spliced in mid-ocean and laid to Valentia Island, Ireland, and Heart's Content, Newfoundland. On August 16, 1858, the first official telegrams were exchanged between Queen Victoria of the United Kingdom and U.S. President James Buchanan. Queen Victoria's 98-word message took nearly 16 hours to transmit, highlighting the technical limitations, but still represented a monumental leap in communication speed. Unfortunately, the triumph was short-lived; the cable's signal quality rapidly degraded, and it ceased functioning entirely on October 20, 1858, just three weeks after its inauguration. The failure was attributed to faulty manufacturing, damage during laying, and crucially, the application of excessive voltage by engineer Wildman Whitehouse in an attempt to improve signal speed.

Despite this significant setback, which undermined public and investor confidence, the demonstration of feasibility spurred further efforts. Cyrus Field, undeterred, continued to raise funds and, in 1865, a new, more robust cable was attempted using the colossal steamship SS Great Eastern. This attempt also failed when the cable broke and was lost mid-ocean. However, the experience gained proved invaluable. In July 1866, the Great Eastern successfully laid a new, improved cable, establishing the first permanent and reliable transatlantic telegraphic connection. Furthermore, the lost 1865 cable was subsequently retrieved, spliced, and brought into service, providing two operational transatlantic cables.

The successful transatlantic cables profoundly impacted global affairs. They revolutionized finance, allowing for near-instantaneous market reactions and the globalization of commodity and stock markets. Diplomatic exchanges and news dissemination were dramatically accelerated, shrinking the world and fostering greater interconnectedness between continents. The groundwork laid by these early telegraph cables was pivotal, paving the way for subsequent generations of submarine communication systems, including transatlantic telephone cables and, eventually, the fiber-optic cables that form the backbone of the modern internet.

As of 2026, the original 1858 telegraph cable is undoubtedly degraded and likely broken into pieces on the ocean floor, having been made of materials susceptible to corrosion and marine life. However, the spirit of transatlantic connectivity it initiated continues to evolve. In March 2026, Japan's NTT announced a new 192-core submarine cable system based on multicore optical fiber, aiming for deployment around 2029, which promises to significantly increase transmission capacity. Concurrently, older fiber-optic cables, such as TAT-8, the first transatlantic internet cable laid in 1988 and retired in 2002, are actively being removed from the ocean floor in 2026 for recycling and to clear routes for new infrastructure. This ongoing cycle of innovation, deployment, and retirement underscores the enduring legacy of the first transatlantic telegraph cable in shaping global communication.