The first permanent transatlantic telegraph cable is successfully completed, stretching from Valentia Island, Ireland, to Heart's Content, Newfoundland.

Transatlantic telegraph cables were undersea cables running under the Atlantic Ocean for telegraph communications. Telegraphy is a largely obsolete form of communication, and the cables have long since been decommissioned, but telephone and data are still carried on other transatlantic telecommunications cables.

Valentia Island is one of Ireland's most westerly points. It lies in Dingle Bay off the Iveragh Peninsula in the southwest of County Kerry. It is linked to the mainland by the Maurice O'Neill Memorial Bridge at Portmagee. A car ferry also departs from Reenard Point to Knightstown, the island's main settlement, from April to October. Another, smaller village named Chapeltown sits at roughly the midpoint of the island, three kilometres from the bridge. Valentia Island's permanent population is 658. It is about 11 kilometres long by almost three kilometres wide, making it the fifth-biggest island off the Irish coast.

Heart's Content is an incorporated town in Trinity Bay on the Bay de Verde Peninsula of Newfoundland and Labrador, Canada.

Newfoundland is a large island within the Canadian province of Newfoundland and Labrador. It is situated off the eastern coast of the North American mainland and the geographical region of Labrador.