The first permanent transatlantic telegraph cable was successfully completed, stretching from Valentia Island, Ireland, to Heart's Content, Newfoundland, on July 27, 1866.
The completion was no easy feat. Indeed, the first attempt at such a cable, made in August 1858, worked for a mere three week. In those weeks, signal quality declined rapidly, slowing transmissions to an almost unusable speed. Part of the speed issue stemmed from the fact that the original cables were not fitted with repeater