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Events on Thursday 5 August 1858 1
1858First transatlantic telegraph cable completedCable links Ireland and Newfoundland for the first timeEngineers aboard the Agamemnon and Niagara completed a submarine telegraph cable connecting Valentia Island, Ireland, to Trinity Bay, Newfoundland. Queen Victoria and President Buchanan exchanged congratulatory messages over the new link. The cable's insulation failed within about a month, and a durable connection was not achieved until 1866.